51651936 has 72 divisors (see below), whose sum is σ = 167875344. Its totient is φ = 14757120.

The previous prime is 51651907. The next prime is 51651949. The reversal of 51651936 is 63915615.

51651936 is a `hidden beast` number, since 516 + 51 + 93 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51651936.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10795 + ... + 14826.

It is an arithmetic number, because the mean of its divisors is an integer number (2331602).

Almost surely, 2^51651936 is an apocalyptic number.

51651936 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51651936 is an abundant number, since it is smaller than the sum of its proper divisors (116223408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51651936 is a wasteful number, since it uses less digits than its factorization.

51651936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25644 (or 25633 counting only the distinct ones).

The product of its digits is 24300, while the sum is 36.

The square root of 51651936 is about 7186.9281337718. The cubic root of 51651936 is about 372.4164604038.

The spelling of 51651936 in words is "fifty-one million, six hundred fifty-one thousand, nine hundred thirty-six".