51322505432 has 64 divisors (see below), whose sum is σ = 106743398400. Its totient is φ = 22939338240.

The previous prime is 51322505309. The next prime is 51322505441. The reversal of 51322505432 is 23450522315.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1242569 + ... + 1283207.

It is an arithmetic number, because the mean of its divisors is an integer number (1667865600).

Almost surely, 2^51322505432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51322505432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53371699200).

51322505432 is an abundant number, since it is smaller than the sum of its proper divisors (55420892968).

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

51322505432 is a wasteful number, since it uses less digits than its factorization.

51322505432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40896 (or 40892 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

The spelling of 51322505432 in words is "fifty-one billion, three hundred twenty-two million, five hundred five thousand, four hundred thirty-two".