51015265 has 32 divisors (see below), whose sum is σ = 73728000. Its totient is φ = 33130944.

The previous prime is 51015259. The next prime is 51015281. The reversal of 51015265 is 56251015.

It is a de Polignac number, because none of the positive numbers 2^k-51015265 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 101986 + ... + 102484.

It is an arithmetic number, because the mean of its divisors is an integer number (2304000).

Almost surely, 2^51015265 is an apocalyptic number.

It is an amenable number.

51015265 is a deficient number, since it is larger than the sum of its proper divisors (22712735).

51015265 is a wasteful number, since it uses less digits than its factorization.

51015265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 51015265 is about 7142.4971123550. The cubic root of 51015265 is about 370.8799727001.

The spelling of 51015265 in words is "fifty-one million, fifteen thousand, two hundred sixty-five".