51551512 has 16 divisors (see below), whose sum is σ = 99777600. Its totient is φ = 24944160.

The previous prime is 51551509. The next prime is 51551537. The reversal of 51551512 is 21515515.

It is a super-2 number, since 2×51551512² = 5315116778972288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103687 + ... + 104182.

It is an arithmetic number, because the mean of its divisors is an integer number (6236100).

Almost surely, 2^51551512 is an apocalyptic number.

It is an amenable number.

51551512 is a deficient number, since it is larger than the sum of its proper divisors (48226088).

51551512 is a wasteful number, since it uses less digits than its factorization.

51551512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207906 (or 207902 counting only the distinct ones).

The product of its digits is 1250, while the sum is 25.

The square root of 51551512 is about 7179.9381612936. The cubic root of 51551512 is about 372.1749475797.

The spelling of 51551512 in words is "fifty-one million, five hundred fifty-one thousand, five hundred twelve".