55991652 has 12 divisors (see below), whose sum is σ = 130647216. Its totient is φ = 18663880.

The previous prime is 55991603. The next prime is 55991669. The reversal of 55991652 is 25619955.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2332974 + ... + 2332997.

It is an arithmetic number, because the mean of its divisors is an integer number (10887268).

Almost surely, 2^55991652 is an apocalyptic number.

It is an amenable number.

55991652 is an abundant number, since it is smaller than the sum of its proper divisors (74655564).

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

55991652 is a wasteful number, since it uses less digits than its factorization.

55991652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4665978 (or 4665976 counting only the distinct ones).

The product of its digits is 121500, while the sum is 42.

The square root of 55991652 is about 7482.7569785474. The cubic root of 55991652 is about 382.5672247175.

The spelling of 55991652 in words is "fifty-five million, nine hundred ninety-one thousand, six hundred fifty-two".