313520431 has 8 divisors (see below), whose sum is σ = 358581024. Its totient is φ = 268527840.

The previous prime is 313520413. The next prime is 313520437. The reversal of 313520431 is 134025313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 313520431 - 2⁷ = 313520303 is a prime.

It is a super-2 number, since 2×313520431² = 196590121308851522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313520437) 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, 6700 + ... + 25921.

It is an arithmetic number, because the mean of its divisors is an integer number (44822628).

Almost surely, 2^313520431 is an apocalyptic number.

313520431 is a deficient number, since it is larger than the sum of its proper divisors (45060593).

313520431 is a wasteful number, since it uses less digits than its factorization.

313520431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34001.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 313520431 is about 17706.5081537835. The cubic root of 313520431 is about 679.3422351999.

Adding to 313520431 its reverse (134025313), we get a palindrome (447545744).

The spelling of 313520431 in words is "three hundred thirteen million, five hundred twenty thousand, four hundred thirty-one".