313322531 has 2 divisors, whose sum is σ = 313322532. Its totient is φ = 313322530.

The previous prime is 313322507. The next prime is 313322543. The reversal of 313322531 is 135223313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 313322531 - 2¹⁰ = 313321507 is a prime.

It is a super-2 number, since 2×313322531² = 196342016864491922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 313322497 and 313322506.

It is not a weakly prime, because it can be changed into another prime (313322431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156661265 + 156661266.

It is an arithmetic number, because the mean of its divisors is an integer number (156661266).

Almost surely, 2^313322531 is an apocalyptic number.

313322531 is a deficient number, since it is larger than the sum of its proper divisors (1).

313322531 is an equidigital number, since it uses as much as digits as its factorization.

313322531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 23.

The square root of 313322531 is about 17700.9189309482. The cubic root of 313322531 is about 679.1992672438.

Adding to 313322531 its reverse (135223313), we get a palindrome (448545844).

The spelling of 313322531 in words is "three hundred thirteen million, three hundred twenty-two thousand, five hundred thirty-one".