315961540 has 12 divisors (see below), whose sum is σ = 663519276. Its totient is φ = 126384608.

The previous prime is 315961523. The next prime is 315961553. The reversal of 315961540 is 45169513.

It can be written as a sum of positive squares in 2 ways, for example, as 86378436 + 229583104 = 9294^2 + 15152^2 .

It is a junction number, because it is equal to n+sod(n) for n = 315961496 and 315961505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7899019 + ... + 7899058.

It is an arithmetic number, because the mean of its divisors is an integer number (55293273).

Almost surely, 2^315961540 is an apocalyptic number.

It is an amenable number.

315961540 is an abundant number, since it is smaller than the sum of its proper divisors (347557736).

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

315961540 is a wasteful number, since it uses less digits than its factorization.

315961540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15798086 (or 15798084 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 315961540 is about 17775.3070296971. The cubic root of 315961540 is about 681.1008265248.

The spelling of 315961540 in words is "three hundred fifteen million, nine hundred sixty-one thousand, five hundred forty".