51115125 has 32 divisors (see below), whose sum is σ = 87819264. Its totient is φ = 26376000.

The previous prime is 51115123. The next prime is 51115147. The reversal of 51115125 is 52151115.

It is not a de Polignac number, because 51115125 - 2¹ = 51115123 is a prime.

It is a super-2 number, since 2×51115125² = 5225512007531250, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51115121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9427 + ... + 13823.

It is an arithmetic number, because the mean of its divisors is an integer number (2744352).

Almost surely, 2^51115125 is an apocalyptic number.

It is an amenable number.

51115125 is a deficient number, since it is larger than the sum of its proper divisors (36704139).

51115125 is a wasteful number, since it uses less digits than its factorization.

51115125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4446 (or 4436 counting only the distinct ones).

The product of its digits is 250, while the sum is 21.

The square root of 51115125 is about 7149.4842471328. The cubic root of 51115125 is about 371.1218083863.

The spelling of 51115125 in words is "fifty-one million, one hundred fifteen thousand, one hundred twenty-five".