51538460 has 24 divisors (see below), whose sum is σ = 108444336. Its totient is φ = 20574720.

The previous prime is 51538453. The next prime is 51538471. The reversal of 51538460 is 6483515.

It is a happy number.

It is a congruent number.

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, 9164 + ... + 13676.

It is an arithmetic number, because the mean of its divisors is an integer number (4518514).

Almost surely, 2^51538460 is an apocalyptic number.

It is an amenable number.

51538460 is an abundant number, since it is smaller than the sum of its proper divisors (56905876).

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

51538460 is a wasteful number, since it uses less digits than its factorization.

51538460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5093 (or 5091 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 51538460 is about 7179.0291822781. The cubic root of 51538460 is about 372.1435353913.

The spelling of 51538460 in words is "fifty-one million, five hundred thirty-eight thousand, four hundred sixty".