51500625 has 60 divisors (see below), whose sum is σ = 94732176. Its totient is φ = 24860000.

The previous prime is 51500609. The next prime is 51500639. The reversal of 51500625 is 52600515.

It is not a de Polignac number, because 51500625 - 2⁴ = 51500609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51500595 and 51500604.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 226762 + ... + 226988.

Almost surely, 2^51500625 is an apocalyptic number.

51500625 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51500625 is a deficient number, since it is larger than the sum of its proper divisors (43231551).

51500625 is a wasteful number, since it uses less digits than its factorization.

51500625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 51500625 is about 7176.3935928849. The cubic root of 51500625 is about 372.0524480912.

It can be divided in two parts, 51500 and 625, that added together give a palindrome (52125).

The spelling of 51500625 in words is "fifty-one million, five hundred thousand, six hundred twenty-five".