313044521 has 2 divisors, whose sum is σ = 313044522. Its totient is φ = 313044520.

The previous prime is 313044517. The next prime is 313044527. The reversal of 313044521 is 125440313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275394025 + 37650496 = 16595^2 + 6136^2 .

It is a cyclic number.

It is not a de Polignac number, because 313044521 - 2² = 313044517 is a prime.

It is not a weakly prime, because it can be changed into another prime (313044527) 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, 156522260 + 156522261.

It is an arithmetic number, because the mean of its divisors is an integer number (156522261).

Almost surely, 2^313044521 is an apocalyptic number.

It is an amenable number.

313044521 is a deficient number, since it is larger than the sum of its proper divisors (1).

313044521 is an equidigital number, since it uses as much as digits as its factorization.

313044521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 313044521 is about 17693.0642060667. The cubic root of 313044521 is about 678.9983240784.

Adding to 313044521 its reverse (125440313), we get a palindrome (438484834).

The spelling of 313044521 in words is "three hundred thirteen million, forty-four thousand, five hundred twenty-one".