313025021 has 2 divisors, whose sum is σ = 313025022. Its totient is φ = 313025020.

The previous prime is 313024991. The next prime is 313025023. The reversal of 313025021 is 120520313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174609796 + 138415225 = 13214^2 + 11765^2 .

It is a cyclic number.

It is not a de Polignac number, because 313025021 - 2²⁶ = 245916157 is a prime.

Together with 313025023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313025023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156512510 + 156512511.

It is an arithmetic number, because the mean of its divisors is an integer number (156512511).

Almost surely, 2^313025021 is an apocalyptic number.

It is an amenable number.

313025021 is a deficient number, since it is larger than the sum of its proper divisors (1).

313025021 is an equidigital number, since it uses as much as digits as its factorization.

313025021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 313025021 is about 17692.5131340915. The cubic root of 313025021 is about 678.9842251868.

Adding to 313025021 its reverse (120520313), we get a palindrome (433545334).

The spelling of 313025021 in words is "three hundred thirteen million, twenty-five thousand, twenty-one".