55216992 has 24 divisors (see below), whose sum is σ = 144944856. Its totient is φ = 18405632.

The previous prime is 55216991. The next prime is 55216999. The reversal of 55216992 is 29961255.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 55216992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55216991) 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 3 ways as a sum of consecutive naturals, for example, 287493 + ... + 287684.

It is an arithmetic number, because the mean of its divisors is an integer number (6039369).

Almost surely, 2^55216992 is an apocalyptic number.

It is an amenable number.

55216992 is an abundant number, since it is smaller than the sum of its proper divisors (89727864).

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

55216992 is a wasteful number, since it uses less digits than its factorization.

55216992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575190 (or 575182 counting only the distinct ones).

The product of its digits is 48600, while the sum is 39.

The square root of 55216992 is about 7430.8136835746. The cubic root of 55216992 is about 380.7947172254.

The spelling of 55216992 in words is "fifty-five million, two hundred sixteen thousand, nine hundred ninety-two".