315971656 has 192 divisors, whose sum is σ = 852647040. Its totient is φ = 106444800.

The previous prime is 315971651. The next prime is 315971659. The reversal of 315971656 is 656179513.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (315971651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1497391 + ... + 1497601.

It is an arithmetic number, because the mean of its divisors is an integer number (4440870).

Almost surely, 2^315971656 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 315971656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426323520).

315971656 is an abundant number, since it is smaller than the sum of its proper divisors (536675384).

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

315971656 is a wasteful number, since it uses less digits than its factorization.

315971656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 261 counting only the distinct ones).

The product of its digits is 170100, while the sum is 43.

The square root of 315971656 is about 17775.5915794665. The cubic root of 315971656 is about 681.1080952812.

The spelling of 315971656 in words is "three hundred fifteen million, nine hundred seventy-one thousand, six hundred fifty-six".