313132513 has 2 divisors, whose sum is σ = 313132514. Its totient is φ = 313132512.

The previous prime is 313132499. The next prime is 313132531. The reversal of 313132513 is 315231313.

It is a happy number.

Together with next prime (313132531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202293729 + 110838784 = 14223^2 + 10528^2 .

It is a cyclic number.

It is not a de Polignac number, because 313132513 - 2⁵ = 313132481 is a prime.

It is not a weakly prime, because it can be changed into another prime (313132553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156566256 + 156566257.

It is an arithmetic number, because the mean of its divisors is an integer number (156566257).

Almost surely, 2^313132513 is an apocalyptic number.

It is an amenable number.

313132513 is a deficient number, since it is larger than the sum of its proper divisors (1).

313132513 is an equidigital number, since it uses as much as digits as its factorization.

313132513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 22.

The square root of 313132513 is about 17695.5506554614. The cubic root of 313132513 is about 679.0619367804.

Adding to 313132513 its reverse (315231313), we get a palindrome (628363826).

The spelling of 313132513 in words is "three hundred thirteen million, one hundred thirty-two thousand, five hundred thirteen".