51312252825 has 18 divisors (see below), whose sum is σ = 91905946574. Its totient is φ = 27366534720.

The previous prime is 51312252769. The next prime is 51312252869. The reversal of 51312252825 is 52825221315.

51312252825 is a `hidden beast` number, since 5 + 1 + 3 + 122 + 528 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 6716949849 + 44595302976 = 81957^2 + 211176^2 .

It is not a de Polignac number, because 51312252825 - 2²⁸ = 51043817369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51312252825.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 114027004 + ... + 114027453.

Almost surely, 2^51312252825 is an apocalyptic number.

It is an amenable number.

51312252825 is a deficient number, since it is larger than the sum of its proper divisors (40593693749).

51312252825 is a wasteful number, since it uses less digits than its factorization.

51312252825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228054473 (or 228054465 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The spelling of 51312252825 in words is "fifty-one billion, three hundred twelve million, two hundred fifty-two thousand, eight hundred twenty-five".