51801022525 has 18 divisors (see below), whose sum is σ = 74720333850. Its totient is φ = 35520700320.

The previous prime is 51801022501. The next prime is 51801022531. The reversal of 51801022525 is 52522010815.

It can be written as a sum of positive squares in 3 ways, for example, as 10187470489 + 41613552036 = 100933^2 + 203994^2 .

It is not a de Polignac number, because 51801022525 - 2³¹ = 49653538877 is a prime.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 21142050 + ... + 21144499.

Almost surely, 2^51801022525 is an apocalyptic number.

It is an amenable number.

51801022525 is a deficient number, since it is larger than the sum of its proper divisors (22919311325).

51801022525 is a wasteful number, since it uses less digits than its factorization.

51801022525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42286573 (or 42286561 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 31.

The spelling of 51801022525 in words is "fifty-one billion, eight hundred one million, twenty-two thousand, five hundred twenty-five".