313055621 has 2 divisors, whose sum is σ = 313055622. Its totient is φ = 313055620.

The previous prime is 313055537. The next prime is 313055627. The reversal of 313055621 is 126550313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181953121 + 131102500 = 13489^2 + 11450^2 .

It is a cyclic number.

It is not a de Polignac number, because 313055621 - 2¹⁸ = 312793477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313055627) 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 as a sum of consecutive naturals, namely, 156527810 + 156527811.

It is an arithmetic number, because the mean of its divisors is an integer number (156527811).

Almost surely, 2^313055621 is an apocalyptic number.

It is an amenable number.

313055621 is a deficient number, since it is larger than the sum of its proper divisors (1).

313055621 is an equidigital number, since it uses as much as digits as its factorization.

313055621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 313055621 is about 17693.3778855254. The cubic root of 313055621 is about 679.0063493398.

The spelling of 313055621 in words is "three hundred thirteen million, fifty-five thousand, six hundred twenty-one".