51437220 has 24 divisors (see below), whose sum is σ = 144024384. Its totient is φ = 13716576.

The previous prime is 51437219. The next prime is 51437251. The reversal of 51437220 is 2273415.

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, 428584 + ... + 428703.

It is an arithmetic number, because the mean of its divisors is an integer number (6001016).

Almost surely, 2^51437220 is an apocalyptic number.

It is an amenable number.

51437220 is an abundant number, since it is smaller than the sum of its proper divisors (92587164).

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

51437220 is a wasteful number, since it uses less digits than its factorization.

51437220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857299 (or 857297 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 51437220 is about 7171.9746234911. The cubic root of 51437220 is about 371.8997012521.

The spelling of 51437220 in words is "fifty-one million, four hundred thirty-seven thousand, two hundred twenty".