315656 has 32 divisors (see below), whose sum is σ = 686880. Its totient is φ = 134400.

The previous prime is 315643. The next prime is 315671. The reversal of 315656 is 656513.

It is an unprimeable number.

315656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1391 + ... + 1601.

It is an arithmetic number, because the mean of its divisors is an integer number (21465).

2³¹⁵⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 315656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343440).

315656 is an abundant number, since it is smaller than the sum of its proper divisors (371224).

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

315656 is a wasteful number, since it uses less digits than its factorization.

315656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245 (or 241 counting only the distinct ones).

The product of its digits is 2700, while the sum is 26.

The square root of 315656 is about 561.8327153166. The cubic root of 315656 is about 68.0881210489.

The spelling of 315656 in words is "three hundred fifteen thousand, six hundred fifty-six".