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315248155 = 5401157231
BaseRepresentation
bin10010110010100…
…100111000011011
3210222012021011121
4102302210320123
51121200420110
651140510111
710545364555
oct2262447033
9728167147
10315248155
11151a49672
12896ab337
1350409391
142dc224d5
151ca21cda
hex12ca4e1b

315248155 has 8 divisors (see below), whose sum is σ = 379243584. Its totient is φ = 251568000.

The previous prime is 315248149. The next prime is 315248159. The reversal of 315248155 is 551842513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 315248155 - 223 = 306859547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315248155.

It is not an unprimeable number, because it can be changed into a prime (315248159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76611 + ... + 80620.

It is an arithmetic number, because the mean of its divisors is an integer number (47405448).

Almost surely, 2315248155 is an apocalyptic number.

315248155 is a deficient number, since it is larger than the sum of its proper divisors (63995429).

315248155 is a wasteful number, since it uses less digits than its factorization.

315248155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157637.

The product of its digits is 24000, while the sum is 34.

The square root of 315248155 is about 17755.2289481155. The cubic root of 315248155 is about 680.5878387154.

The spelling of 315248155 in words is "three hundred fifteen million, two hundred forty-eight thousand, one hundred fifty-five".

Divisors: 1 5 401 2005 157231 786155 63049631 315248155