51904 has 14 divisors (see below), whose sum is σ = 103124. Its totient is φ = 25920.

The previous prime is 51899. The next prime is 51907. The reversal of 51904 is 40915.

It is not an unprimeable number, because it can be changed into a prime (51907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342 + ... + 469.

It is an arithmetic number, because the mean of its divisors is an integer number (7366).

2⁵¹⁹⁰⁴ is an apocalyptic number.

It is an amenable number.

51904 is a deficient number, since it is larger than the sum of its proper divisors (51220).

51904 is an equidigital number, since it uses as much as digits as its factorization.

51904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 813 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 51904 is about 227.8244938544. The cubic root of 51904 is about 37.3021281193.

The spelling of 51904 in words is "fifty-one thousand, nine hundred four".