51087625 has 8 divisors (see below), whose sum is σ = 63757512. Its totient is φ = 40870000.

The previous prime is 51087613. The next prime is 51087661. The reversal of 51087625 is 52678015.

It can be written as a sum of positive squares in 4 ways, for example, as 207936 + 50879689 = 456^2 + 7133^2 .

It is not a de Polignac number, because 51087625 - 2⁵ = 51087593 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204226 + ... + 204475.

It is an arithmetic number, because the mean of its divisors is an integer number (7969689).

Almost surely, 2^51087625 is an apocalyptic number.

It is an amenable number.

51087625 is a deficient number, since it is larger than the sum of its proper divisors (12669887).

51087625 is an equidigital number, since it uses as much as digits as its factorization.

51087625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408716 (or 408706 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 51087625 is about 7147.5607727392. The cubic root of 51087625 is about 371.0552417844.

The spelling of 51087625 in words is "fifty-one million, eighty-seven thousand, six hundred twenty-five".