515720113 has 4 divisors (see below), whose sum is σ = 527713648. Its totient is φ = 503726580.

The previous prime is 515720111. The next prime is 515720129. The reversal of 515720113 is 311027515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 515720113 - 2¹ = 515720111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (515720111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5996703 + ... + 5996788.

It is an arithmetic number, because the mean of its divisors is an integer number (131928412).

Almost surely, 2^515720113 is an apocalyptic number.

It is an amenable number.

515720113 is a deficient number, since it is larger than the sum of its proper divisors (11993535).

515720113 is a wasteful number, since it uses less digits than its factorization.

515720113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11993534.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 515720113 is about 22709.4718784916. The cubic root of 515720113 is about 801.9328850373.

Adding to 515720113 its reverse (311027515), we get a palindrome (826747628).

The spelling of 515720113 in words is "five hundred fifteen million, seven hundred twenty thousand, one hundred thirteen".