51981304 has 16 divisors (see below), whose sum is σ = 97554600. Its totient is φ = 25966752.

The previous prime is 51981277. The next prime is 51981313. The reversal of 51981304 is 40318915.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9159 + ... + 13705.

Almost surely, 2^51981304 is an apocalyptic number.

It is an amenable number.

51981304 is a deficient number, since it is larger than the sum of its proper divisors (45573296).

51981304 is a wasteful number, since it uses less digits than its factorization.

51981304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5982 (or 5978 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 51981304 is about 7209.8061000279. The cubic root of 51981304 is about 373.2063776090.

The spelling of 51981304 in words is "fifty-one million, nine hundred eighty-one thousand, three hundred four".