315123056 has 40 divisors (see below), whose sum is σ = 646387200. Its totient is φ = 148409280.

The previous prime is 315123013. The next prime is 315123073. The reversal of 315123056 is 650321513.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51521 + ... + 57311.

It is an arithmetic number, because the mean of its divisors is an integer number (16159680).

Almost surely, 2^315123056 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 315123056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323193600).

315123056 is an abundant number, since it is smaller than the sum of its proper divisors (331264144).

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

315123056 is a wasteful number, since it uses less digits than its factorization.

315123056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5997 (or 5991 counting only the distinct ones).

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

The square root of 315123056 is about 17751.7057208596. The cubic root of 315123056 is about 680.4978015798.

Adding to 315123056 its reverse (650321513), we get a palindrome (965444569).

The spelling of 315123056 in words is "three hundred fifteen million, one hundred twenty-three thousand, fifty-six".