313421513 has 2 divisors, whose sum is σ = 313421514. Its totient is φ = 313421512.

The previous prime is 313421443. The next prime is 313421533. The reversal of 313421513 is 315124313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249229369 + 64192144 = 15787^2 + 8012^2 .

It is a cyclic number.

It is not a de Polignac number, because 313421513 - 2⁸ = 313421257 is a prime.

It is a super-2 number, since 2×313421513² = 196466089622418338, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (313421533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156710756 + 156710757.

It is an arithmetic number, because the mean of its divisors is an integer number (156710757).

Almost surely, 2^313421513 is an apocalyptic number.

It is an amenable number.

313421513 is a deficient number, since it is larger than the sum of its proper divisors (1).

313421513 is an equidigital number, since it uses as much as digits as its factorization.

313421513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 23.

The square root of 313421513 is about 17703.7146667020. The cubic root of 313421513 is about 679.2707818622.

Adding to 313421513 its reverse (315124313), we get a palindrome (628545826).

The spelling of 313421513 in words is "three hundred thirteen million, four hundred twenty-one thousand, five hundred thirteen".