51531128088 has 32 divisors (see below), whose sum is σ = 140539440960. Its totient is φ = 15615493280.

The previous prime is 51531128083. The next prime is 51531128111. The reversal of 51531128088 is 88082113515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51531128081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97596570 + ... + 97597097.

It is an arithmetic number, because the mean of its divisors is an integer number (4391857530).

Almost surely, 2^51531128088 is an apocalyptic number.

It is an amenable number.

51531128088 is an abundant number, since it is smaller than the sum of its proper divisors (89008312872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51531128088 is a wasteful number, since it uses less digits than its factorization.

51531128088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195193687 (or 195193683 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 42.

The spelling of 51531128088 in words is "fifty-one billion, five hundred thirty-one million, one hundred twenty-eight thousand, eighty-eight".