51567256251 has 24 divisors (see below), whose sum is σ = 85145739744. Its totient is φ = 29460481920.

The previous prime is 51567256243. The next prime is 51567256253. The reversal of 51567256251 is 15265276515.

51567256251 is a `hidden beast` number, since 5 + 1 + 567 + 25 + 62 + 5 + 1 = 666.

It is not a de Polignac number, because 51567256251 - 2³ = 51567256243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51567256197 and 51567256206.

It is not an unprimeable number, because it can be changed into a prime (51567256253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 203871 + ... + 380391.

It is an arithmetic number, because the mean of its divisors is an integer number (3547739156).

Almost surely, 2^51567256251 is an apocalyptic number.

51567256251 is a deficient number, since it is larger than the sum of its proper divisors (33578483493).

51567256251 is a wasteful number, since it uses less digits than its factorization.

51567256251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181171 (or 181168 counting only the distinct ones).

The product of its digits is 630000, while the sum is 45.

The spelling of 51567256251 in words is "fifty-one billion, five hundred sixty-seven million, two hundred fifty-six thousand, two hundred fifty-one".