51291445332 has 24 divisors (see below), whose sum is σ = 119683922400. Its totient is φ = 17096593696.

The previous prime is 51291445313. The next prime is 51291445349. The reversal of 51291445332 is 23354419215.

51291445332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508519 + ... + 600977.

It is an arithmetic number, because the mean of its divisors is an integer number (4986830100).

Almost surely, 2^51291445332 is an apocalyptic number.

It is an amenable number.

51291445332 is an abundant number, since it is smaller than the sum of its proper divisors (68392477068).

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

51291445332 is a wasteful number, since it uses less digits than its factorization.

51291445332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138695 (or 138693 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The spelling of 51291445332 in words is "fifty-one billion, two hundred ninety-one million, four hundred forty-five thousand, three hundred thirty-two".