51329992 has 32 divisors (see below), whose sum is σ = 110848320. Its totient is φ = 21827520.

The previous prime is 51329983. The next prime is 51330007. The reversal of 51329992 is 29992315.

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, 3838 + ... + 10834.

It is an arithmetic number, because the mean of its divisors is an integer number (3464010).

Almost surely, 2^51329992 is an apocalyptic number.

It is an amenable number.

51329992 is an abundant number, since it is smaller than the sum of its proper divisors (59518328).

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

51329992 is a wasteful number, since it uses less digits than its factorization.

51329992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7141 (or 7137 counting only the distinct ones).

The product of its digits is 43740, while the sum is 40.

The square root of 51329992 is about 7164.4952369305. The cubic root of 51329992 is about 371.6410960129.

The spelling of 51329992 in words is "fifty-one million, three hundred twenty-nine thousand, nine hundred ninety-two".