313505531 has 2 divisors, whose sum is σ = 313505532. Its totient is φ = 313505530.

The previous prime is 313505509. The next prime is 313505579. The reversal of 313505531 is 135505313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 313505531 - 2¹⁰ = 313504507 is a prime.

It is a super-2 number, since 2×313505531² = 196571435935183922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 313505531.

It is not a weakly prime, because it can be changed into another prime (313505431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156752765 + 156752766.

It is an arithmetic number, because the mean of its divisors is an integer number (156752766).

Almost surely, 2^313505531 is an apocalyptic number.

313505531 is a deficient number, since it is larger than the sum of its proper divisors (1).

313505531 is an equidigital number, since it uses as much as digits as its factorization.

313505531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3375, while the sum is 26.

The square root of 313505531 is about 17706.0873995358. The cubic root of 313505531 is about 679.3314731584.

The spelling of 313505531 in words is "three hundred thirteen million, five hundred five thousand, five hundred thirty-one".