313325531 has 2 divisors, whose sum is σ = 313325532. Its totient is φ = 313325530.

The previous prime is 313325513. The next prime is 313325539. The reversal of 313325531 is 135523313.

Together with previous prime (313325513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313325531 is a prime.

It is a super-2 number, since 2×313325531² = 196345776752863922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 313325531.

It is not a weakly prime, because it can be changed into another prime (313325539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156662765 + 156662766.

It is an arithmetic number, because the mean of its divisors is an integer number (156662766).

Almost surely, 2^313325531 is an apocalyptic number.

313325531 is a deficient number, since it is larger than the sum of its proper divisors (1).

313325531 is an equidigital number, since it uses as much as digits as its factorization.

313325531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4050, while the sum is 26.

The square root of 313325531 is about 17701.0036721085. The cubic root of 313325531 is about 679.2014349688.

Adding to 313325531 its reverse (135523313), we get a palindrome (448848844).

It can be divided in two parts, 31332 and 5531, that added together give a palindrome (36863).

The spelling of 313325531 in words is "three hundred thirteen million, three hundred twenty-five thousand, five hundred thirty-one".