313161520 has 40 divisors (see below), whose sum is σ = 832116384. Its totient is φ = 107369472.

The previous prime is 313161487. The next prime is 313161523. The reversal of 313161520 is 25161313.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 313161491 and 313161500.

It is not an unprimeable number, because it can be changed into a prime (313161523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279049 + ... + 280168.

Almost surely, 2^313161520 is an apocalyptic number.

It is an amenable number.

313161520 is an abundant number, since it is smaller than the sum of its proper divisors (518954864).

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

313161520 is a wasteful number, since it uses less digits than its factorization.

313161520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559237 (or 559231 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 313161520 is about 17696.3702492912. The cubic root of 313161520 is about 679.0829044119.

The spelling of 313161520 in words is "three hundred thirteen million, one hundred sixty-one thousand, five hundred twenty".