51969928 has 16 divisors (see below), whose sum is σ = 97522380. Its totient is φ = 25963968.

The previous prime is 51969887. The next prime is 51969961. The reversal of 51969928 is 82996915.

It can be written as a sum of positive squares in 2 ways, for example, as 51868804 + 101124 = 7202^2 + 318^2 .

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, 14350 + ... + 17602.

Almost surely, 2^51969928 is an apocalyptic number.

It is an amenable number.

51969928 is a deficient number, since it is larger than the sum of its proper divisors (45552452).

51969928 is a wasteful number, since it uses less digits than its factorization.

51969928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5256 (or 5252 counting only the distinct ones).

The product of its digits is 349920, while the sum is 49.

The square root of 51969928 is about 7209.0171313432. The cubic root of 51969928 is about 373.1791504768.

The spelling of 51969928 in words is "fifty-one million, nine hundred sixty-nine thousand, nine hundred twenty-eight".