315781056 has 84 divisors (see below), whose sum is σ = 908816064. Its totient is φ = 104832000.

The previous prime is 315781033. The next prime is 315781061. The reversal of 315781056 is 650187513.

315781056 is a `hidden beast` number, since 31 + 578 + 1 + 0 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 315781056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160881 + ... + 162831.

Almost surely, 2^315781056 is an apocalyptic number.

315781056 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 315781056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (454408032).

315781056 is an abundant number, since it is smaller than the sum of its proper divisors (593035008).

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

315781056 is a wasteful number, since it uses less digits than its factorization.

315781056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250 (or 2237 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 315781056 is about 17770.2294864191. The cubic root of 315781056 is about 680.9711153629.

The spelling of 315781056 in words is "three hundred fifteen million, seven hundred eighty-one thousand, fifty-six".