51031551025 has 36 divisors (see below), whose sum is σ = 79272772572. Its totient is φ = 32301279360.

The previous prime is 51031551013. The next prime is 51031551041. The reversal of 51031551025 is 52015513015.

It can be written as a sum of positive squares in 6 ways, for example, as 21590481969 + 29441069056 = 146937^2 + 171584^2 .

It is not a de Polignac number, because 51031551025 - 2⁵ = 51031550993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51031550984 and 51031551002.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1586322 + ... + 1618171.

Almost surely, 2^51031551025 is an apocalyptic number.

It is an amenable number.

51031551025 is a deficient number, since it is larger than the sum of its proper divisors (28241221547).

51031551025 is a wasteful number, since it uses less digits than its factorization.

51031551025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204530 (or 3204518 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 28.

The spelling of 51031551025 in words is "fifty-one billion, thirty-one million, five hundred fifty-one thousand, twenty-five".