51655512 has 32 divisors (see below), whose sum is σ = 129970800. Its totient is φ = 17107584.

The previous prime is 51655501. The next prime is 51655519. The reversal of 51655512 is 21555615.

It is a self number, because there is not a number n which added to its sum of digits gives 51655512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51655519) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3087 + ... + 10622.

Almost surely, 2^51655512 is an apocalyptic number.

It is an amenable number.

51655512 is an abundant number, since it is smaller than the sum of its proper divisors (78315288).

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

51655512 is a wasteful number, since it uses less digits than its factorization.

51655512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13875 (or 13871 counting only the distinct ones).

The product of its digits is 7500, while the sum is 30.

The square root of 51655512 is about 7187.1769144776. The cubic root of 51655512 is about 372.4250546639.

The spelling of 51655512 in words is "fifty-one million, six hundred fifty-five thousand, five hundred twelve".