313521513 has 4 divisors (see below), whose sum is σ = 418028688. Its totient is φ = 209014340.

The previous prime is 313521493. The next prime is 313521529. The reversal of 313521513 is 315125313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 313521513 - 2¹⁰ = 313520489 is a prime.

It is a super-2 number, since 2×313521513² = 196591478227618338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (313521563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52253583 + ... + 52253588.

It is an arithmetic number, because the mean of its divisors is an integer number (104507172).

Almost surely, 2^313521513 is an apocalyptic number.

It is an amenable number.

313521513 is a deficient number, since it is larger than the sum of its proper divisors (104507175).

313521513 is a wasteful number, since it uses less digits than its factorization.

313521513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104507174.

The product of its digits is 1350, while the sum is 24.

The square root of 313521513 is about 17706.5387074945. The cubic root of 313521513 is about 679.3430166987.

Adding to 313521513 its reverse (315125313), we get a palindrome (628646826).

The spelling of 313521513 in words is "three hundred thirteen million, five hundred twenty-one thousand, five hundred thirteen".