51610625 has 20 divisors (see below), whose sum is σ = 70364976. Its totient is φ = 37530000.

The previous prime is 51610613. The next prime is 51610627. The reversal of 51610625 is 52601615.

It is not a de Polignac number, because 51610625 - 2¹⁸ = 51348481 is a prime.

It is a super-2 number, since 2×51610625² = 5327313225781250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 51610594 and 51610603.

It is not an unprimeable number, because it can be changed into a prime (51610627) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3122 + ... + 10628.

Almost surely, 2^51610625 is an apocalyptic number.

51610625 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51610625 is a deficient number, since it is larger than the sum of its proper divisors (18754351).

51610625 is an equidigital number, since it uses as much as digits as its factorization.

51610625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7538 (or 7523 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 51610625 is about 7184.0535215156. The cubic root of 51610625 is about 372.3171482192.

The spelling of 51610625 in words is "fifty-one million, six hundred ten thousand, six hundred twenty-five".