51697136 has 20 divisors (see below), whose sum is σ = 106055712. Its totient is φ = 24327936.

The previous prime is 51697127. The next prime is 51697141. The reversal of 51697136 is 63179615.

51697136 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51697136.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94760 + ... + 95303.

Almost surely, 2^51697136 is an apocalyptic number.

It is an amenable number.

51697136 is an abundant number, since it is smaller than the sum of its proper divisors (54358576).

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

51697136 is a wasteful number, since it uses less digits than its factorization.

51697136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190088 (or 190082 counting only the distinct ones).

The product of its digits is 34020, while the sum is 38.

The square root of 51697136 is about 7190.0720441453. The cubic root of 51697136 is about 372.5250611489.

The spelling of 51697136 in words is "fifty-one million, six hundred ninety-seven thousand, one hundred thirty-six".