515720725 has 24 divisors (see below), whose sum is σ = 689955840. Its totient is φ = 380137920.

The previous prime is 515720713. The next prime is 515720731. The reversal of 515720725 is 527027515.

It is not a de Polignac number, because 515720725 - 2⁹ = 515720213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232572 + ... + 234778.

It is an arithmetic number, because the mean of its divisors is an integer number (28748160).

Almost surely, 2^515720725 is an apocalyptic number.

It is an amenable number.

515720725 is a deficient number, since it is larger than the sum of its proper divisors (174235115).

515720725 is a wasteful number, since it uses less digits than its factorization.

515720725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2949 (or 2944 counting only the distinct ones).

The product of its (nonzero) digits is 24500, while the sum is 34.

The square root of 515720725 is about 22709.4853530414. The cubic root of 515720725 is about 801.9332022525.

The spelling of 515720725 in words is "five hundred fifteen million, seven hundred twenty thousand, seven hundred twenty-five".