51989804 has 12 divisors (see below), whose sum is σ = 93201528. Its totient is φ = 25360800.

The previous prime is 51989803. The next prime is 51989809. The reversal of 51989804 is 40898915.

It is not an unprimeable number, because it can be changed into a prime (51989801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158342 + ... + 158669.

It is an arithmetic number, because the mean of its divisors is an integer number (7766794).

Almost surely, 2^51989804 is an apocalyptic number.

It is an amenable number.

51989804 is a deficient number, since it is larger than the sum of its proper divisors (41211724).

51989804 is a wasteful number, since it uses less digits than its factorization.

51989804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317056 (or 317054 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 51989804 is about 7210.3955508696. The cubic root of 51989804 is about 373.2267187770.

The spelling of 51989804 in words is "fifty-one million, nine hundred eighty-nine thousand, eight hundred four".