51905804 has 6 divisors (see below), whose sum is σ = 90835164. Its totient is φ = 25952900.

The previous prime is 51905801. The next prime is 51905831. The reversal of 51905804 is 40850915.

It is not an unprimeable number, because it can be changed into a prime (51905801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6488222 + ... + 6488229.

It is an arithmetic number, because the mean of its divisors is an integer number (15139194).

Almost surely, 2^51905804 is an apocalyptic number.

It is an amenable number.

51905804 is a deficient number, since it is larger than the sum of its proper divisors (38929360).

51905804 is a wasteful number, since it uses less digits than its factorization.

51905804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12976455 (or 12976453 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 51905804 is about 7204.5682729779. The cubic root of 51905804 is about 373.0256027775.

The spelling of 51905804 in words is "fifty-one million, nine hundred five thousand, eight hundred four".