315121056 has 24 divisors (see below), whose sum is σ = 827193024. Its totient is φ = 105040320.

The previous prime is 315121043. The next prime is 315121063. The reversal of 315121056 is 650121513.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1641160 + ... + 1641351.

It is an arithmetic number, because the mean of its divisors is an integer number (34466376).

Almost surely, 2^315121056 is an apocalyptic number.

It is an amenable number.

315121056 is an abundant number, since it is smaller than the sum of its proper divisors (512071968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

315121056 is a wasteful number, since it uses less digits than its factorization.

315121056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3282524 (or 3282516 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 315121056 is about 17751.6493881555. The cubic root of 315121056 is about 680.4963619322.

Adding to 315121056 its reverse (650121513), we get a palindrome (965242569).

The spelling of 315121056 in words is "three hundred fifteen million, one hundred twenty-one thousand, fifty-six".