313224391 has 2 divisors, whose sum is σ = 313224392. Its totient is φ = 313224390.

The previous prime is 313224383. The next prime is 313224433. The reversal of 313224391 is 193422313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 313224391 - 2³ = 313224383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313224311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156612195 + 156612196.

It is an arithmetic number, because the mean of its divisors is an integer number (156612196).

Almost surely, 2^313224391 is an apocalyptic number.

313224391 is a deficient number, since it is larger than the sum of its proper divisors (1).

313224391 is an equidigital number, since it uses as much as digits as its factorization.

313224391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 28.

The square root of 313224391 is about 17698.1465413755. The cubic root of 313224391 is about 679.1283461001.

The spelling of 313224391 in words is "three hundred thirteen million, two hundred twenty-four thousand, three hundred ninety-one".