51430920 has 64 divisors (see below), whose sum is σ = 159624000. Its totient is φ = 13241088.

The previous prime is 51430919. The next prime is 51430943. The reversal of 51430920 is 2903415.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3910 + ... + 10869.

It is an arithmetic number, because the mean of its divisors is an integer number (2494125).

Almost surely, 2^51430920 is an apocalyptic number.

It is an amenable number.

51430920 is an abundant number, since it is smaller than the sum of its proper divisors (108193080).

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

51430920 is a wasteful number, since it uses less digits than its factorization.

51430920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14822 (or 14818 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 51430920 is about 7171.5354004564. The cubic root of 51430920 is about 371.8845172811.

The spelling of 51430920 in words is "fifty-one million, four hundred thirty thousand, nine hundred twenty".