51116625 has 48 divisors (see below), whose sum is σ = 105326208. Its totient is φ = 23364000.

The previous prime is 51116621. The next prime is 51116633. The reversal of 51116625 is 52661115.

It is a happy number.

It is not a de Polignac number, because 51116625 - 2² = 51116621 is a prime.

It is a super-2 number, since 2×51116625² = 5225818702781250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51116621) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4630 + ... + 11120.

It is an arithmetic number, because the mean of its divisors is an integer number (2194296).

Almost surely, 2^51116625 is an apocalyptic number.

It is an amenable number.

51116625 is an abundant number, since it is smaller than the sum of its proper divisors (54209583).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51116625 is a wasteful number, since it uses less digits than its factorization.

51116625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6519 (or 6506 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 51116625 is about 7149.5891490351. The cubic root of 51116625 is about 371.1254386051.

The spelling of 51116625 in words is "fifty-one million, one hundred sixteen thousand, six hundred twenty-five".