312530531 has 12 divisors (see below), whose sum is σ = 320104440. Its totient is φ = 305094240.

The previous prime is 312530507. The next prime is 312530539. The reversal of 312530531 is 135035213.

It is not a de Polignac number, because 312530531 - 2⁶ = 312530467 is a prime.

It is a super-2 number, since 2×312530531² = 195350665614283922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312530497 and 312530506.

It is not an unprimeable number, because it can be changed into a prime (312530539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 944036 + ... + 944366.

It is an arithmetic number, because the mean of its divisors is an integer number (26675370).

Almost surely, 2^312530531 is an apocalyptic number.

312530531 is a deficient number, since it is larger than the sum of its proper divisors (7573909).

312530531 is an equidigital number, since it uses as much as digits as its factorization.

312530531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 312530531 is about 17678.5330556582. The cubic root of 312530531 is about 678.6265031315.

Adding to 312530531 its reverse (135035213), we get a palindrome (447565744).

The spelling of 312530531 in words is "three hundred twelve million, five hundred thirty thousand, five hundred thirty-one".