51115984 has 20 divisors (see below), whose sum is σ = 99546084. Its totient is φ = 25426688.

The previous prime is 51115979. The next prime is 51116011. The reversal of 51115984 is 48951115.

It can be written as a sum of positive squares in 2 ways, for example, as 46621584 + 4494400 = 6828^2 + 2120^2 .

It is a super-2 number, since 2×51115984² = 5225687640576512, which contains 22 as substring.

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, 4957 + ... + 11260.

Almost surely, 2^51115984 is an apocalyptic number.

It is an amenable number.

51115984 is a deficient number, since it is larger than the sum of its proper divisors (48430100).

51115984 is a wasteful number, since it uses less digits than its factorization.

51115984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16422 (or 16416 counting only the distinct ones).

The product of its digits is 7200, while the sum is 34.

The square root of 51115984 is about 7149.5443211438. The cubic root of 51115984 is about 371.1238873003.

The spelling of 51115984 in words is "fifty-one million, one hundred fifteen thousand, nine hundred eighty-four".