515113913 has 2 divisors, whose sum is σ = 515113914. Its totient is φ = 515113912.

The previous prime is 515113871. The next prime is 515113919. The reversal of 515113913 is 319311515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 492484864 + 22629049 = 22192^2 + 4757^2 .

It is a cyclic number.

It is not a de Polignac number, because 515113913 - 2⁸ = 515113657 is a prime.

It is not a weakly prime, because it can be changed into another prime (515113919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257556956 + 257556957.

It is an arithmetic number, because the mean of its divisors is an integer number (257556957).

Almost surely, 2^515113913 is an apocalyptic number.

It is an amenable number.

515113913 is a deficient number, since it is larger than the sum of its proper divisors (1).

515113913 is an equidigital number, since it uses as much as digits as its factorization.

515113913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2025, while the sum is 29.

The square root of 515113913 is about 22696.1211003114. The cubic root of 515113913 is about 801.6185528375.

The spelling of 515113913 in words is "five hundred fifteen million, one hundred thirteen thousand, nine hundred thirteen".