51520551524 has 24 divisors (see below), whose sum is σ = 97188042168. Its totient is φ = 23756279040.

The previous prime is 51520551491. The next prime is 51520551557. The reversal of 51520551524 is 42515502515.

It is an interprime number because it is at equal distance from previous prime (51520551491) and next prime (51520551557).

It can be written as a sum of positive squares in 4 ways, for example, as 12912231424 + 38608320100 = 113632^2 + 196490^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411737 + ... + 522080.

It is an arithmetic number, because the mean of its divisors is an integer number (4049501757).

Almost surely, 2^51520551524 is an apocalyptic number.

It is an amenable number.

51520551524 is a deficient number, since it is larger than the sum of its proper divisors (45667490644).

51520551524 is a wasteful number, since it uses less digits than its factorization.

51520551524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934895 (or 934893 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 35.

The spelling of 51520551524 in words is "fifty-one billion, five hundred twenty million, five hundred fifty-one thousand, five hundred twenty-four".