315656121 has 16 divisors (see below), whose sum is σ = 463204800. Its totient is φ = 189611520.

The previous prime is 315656111. The next prime is 315656123. The reversal of 315656121 is 121656513.

It is not a de Polignac number, because 315656121 - 2⁶ = 315656057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (315656123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38596 + ... + 46053.

It is an arithmetic number, because the mean of its divisors is an integer number (28950300).

Almost surely, 2^315656121 is an apocalyptic number.

It is an amenable number.

315656121 is a deficient number, since it is larger than the sum of its proper divisors (147548679).

315656121 is a wasteful number, since it uses less digits than its factorization.

315656121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84776.

The product of its digits is 5400, while the sum is 30.

The square root of 315656121 is about 17766.7138492181. The cubic root of 315656121 is about 680.8812974896.

The spelling of 315656121 in words is "three hundred fifteen million, six hundred fifty-six thousand, one hundred twenty-one".