51537320 has 32 divisors (see below), whose sum is σ = 116228520. Its totient is φ = 20567040.

The previous prime is 51537313. The next prime is 51537331. The reversal of 51537320 is 2373515.

It can be written as a sum of positive squares in 4 ways, for example, as 41964484 + 9572836 = 6478^2 + 3094^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51537320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19604 + ... + 22076.

Almost surely, 2^51537320 is an apocalyptic number.

It is an amenable number.

51537320 is an abundant number, since it is smaller than the sum of its proper divisors (64691200).

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

51537320 is a wasteful number, since it uses less digits than its factorization.

51537320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3005 (or 3001 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 51537320 is about 7178.9497839169. The cubic root of 51537320 is about 372.1407915067.

The spelling of 51537320 in words is "fifty-one million, five hundred thirty-seven thousand, three hundred twenty".