51555251525 has 12 divisors (see below), whose sum is σ = 66708013152. Its totient is φ = 39450974640.

The previous prime is 51555251507. The next prime is 51555251563. The reversal of 51555251525 is 52515255515.

It is not a de Polignac number, because 51555251525 - 2⁸ = 51555251269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44830079 + ... + 44831228.

It is an arithmetic number, because the mean of its divisors is an integer number (5559001096).

Almost surely, 2^51555251525 is an apocalyptic number.

It is an amenable number.

51555251525 is a deficient number, since it is larger than the sum of its proper divisors (15152761627).

51555251525 is a wasteful number, since it uses less digits than its factorization.

51555251525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89661340 (or 89661335 counting only the distinct ones).

The product of its digits is 312500, while the sum is 41.

The spelling of 51555251525 in words is "fifty-one billion, five hundred fifty-five million, two hundred fifty-one thousand, five hundred twenty-five".