312326531 has 6 divisors (see below), whose sum is σ = 343301196. Its totient is φ = 283933100.

The previous prime is 312326507. The next prime is 312326563. The reversal of 312326531 is 135623213.

It is a de Polignac number, because none of the positive numbers 2^k-312326531 is a prime.

It is a super-2 number, since 2×312326531² = 195095723932987922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312326531.

It is not an unprimeable number, because it can be changed into a prime (312326831) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1290485 + ... + 1290726.

It is an arithmetic number, because the mean of its divisors is an integer number (57216866).

Almost surely, 2^312326531 is an apocalyptic number.

312326531 is a deficient number, since it is larger than the sum of its proper divisors (30974665).

312326531 is a wasteful number, since it uses less digits than its factorization.

312326531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581233 (or 2581222 counting only the distinct ones).

The product of its digits is 3240, while the sum is 26.

The square root of 312326531 is about 17672.7624043328. The cubic root of 312326531 is about 678.4788162920.

Adding to 312326531 its reverse (135623213), we get a palindrome (447949744).

The spelling of 312326531 in words is "three hundred twelve million, three hundred twenty-six thousand, five hundred thirty-one".