Search results
Results from the WOW.Com Content Network
150 is conjectured to be the only minimal difference greater than 1 of any increasing arithmetic progression of n primes (in this case, n = 7) that is not a primorial (a product of the first m primes). [2] The sum of Euler's totient function φ(x) over the first twenty-two integers is 150. 150 is a Harshad number and an abundant number.
The catty is traditionally equivalent to around 1 + 1 ⁄ 3 pound avoirdupois, formalised as 604.78982 grams in Hong Kong, [1] 604.5 grams historically in Vietnam, [2] 604.79 grams in Malaysia [3] and 604.8 grams in Singapore. [4] In some countries, the weight has been rounded to 600 grams (Taiwan, [5] Japan, Korea [6] and Thailand).
152 is the sum of four consecutive primes (31 + 37 + 41 + 43). It is a nontotient since there is no integer with 152 coprimes below it.. 152 is a refactorable number since it is divisible by the total number of divisors it has, and in base 10 it is divisible by the sum of its digits, making it a Harshad number.
The pound or pound-mass is a unit of mass used in both the British imperial and United States customary systems of measurement.Various definitions have been used; the most common today is the international avoirdupois pound, which is legally defined as exactly 0.453 592 37 kilograms, and which is divided into 16 avoirdupois ounces. [1]
Only five other numbers can be expressed as the sum of the cubes of their digits: 0, 1, 370, 371 and 407. [4] It is also a Friedman number, since 153 = 3 × 51. The Biggs–Smith graph is a symmetric graph with 153 edges, all equivalent. Another feature of the number 153 is that it is the limit of the following algorithm: [5] [6] [7]
A 2012 paper [7] revising the estimated half-life of 146 Sm from 10.3(5)×10 7 y to 6.8(7)×10 7 y was retracted in 2023. [7] [8] Isotopes of samarium are used in samarium–neodymium dating for determining the age relationships of rocks and meteorites. 151 Sm is a medium-lived fission product and acts as a neutron poison in the nuclear fuel cycle.
151 appears in the Padovan sequence, preceded by the terms 65, 86, 114; it is the sum of the first two of these. [3] 151 is a unique prime in base 2, since it is the only prime with period 15 in base 2. There are 151 4-uniform tilings, such that the symmetry of tilings with regular polygons have four orbits of vertices. [4]
Thirty-three radioisotopes have been characterized, with the most stable being alpha-decaying 152 Gd (naturally occurring) with a half-life of 1.08×10 14 years, and 150 Gd with a half-life of 1.79×10 6 years. All of the remaining radioactive isotopes have half-lives less than 100 years, the majority of these having half-lives less than 24.6 ...