313520345 has 4 divisors (see below), whose sum is σ = 376224420. Its totient is φ = 250816272.

The previous prime is 313520323. The next prime is 313520357. The reversal of 313520345 is 543025313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 218418841 + 95101504 = 14779^2 + 9752^2 .

It is a cyclic number.

It is not a de Polignac number, because 313520345 - 2⁸ = 313520089 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31352030 + ... + 31352039.

It is an arithmetic number, because the mean of its divisors is an integer number (94056105).

Almost surely, 2^313520345 is an apocalyptic number.

It is an amenable number.

313520345 is a deficient number, since it is larger than the sum of its proper divisors (62704075).

313520345 is an equidigital number, since it uses as much as digits as its factorization.

313520345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62704074.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 313520345 is about 17706.5057252977. The cubic root of 313520345 is about 679.3421730844.

Adding to 313520345 its reverse (543025313), we get a palindrome (856545658).

The spelling of 313520345 in words is "three hundred thirteen million, five hundred twenty thousand, three hundred forty-five".