55613992 has 16 divisors (see below), whose sum is σ = 119172960. Its totient is φ = 23834544.

The previous prime is 55613981. The next prime is 55614001. The reversal of 55613992 is 29931655.

It is a happy number.

It is a super-2 number, since 2×55613992² = 6185832212352128, which contains 22 as substring.

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, 496498 + ... + 496609.

It is an arithmetic number, because the mean of its divisors is an integer number (7448310).

Almost surely, 2^55613992 is an apocalyptic number.

It is an amenable number.

55613992 is an abundant number, since it is smaller than the sum of its proper divisors (63558968).

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

55613992 is a wasteful number, since it uses less digits than its factorization.

55613992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 993120 (or 993116 counting only the distinct ones).

The product of its digits is 72900, while the sum is 40.

The square root of 55613992 is about 7457.4789305770. The cubic root of 55613992 is about 381.7051533644.

The spelling of 55613992 in words is "fifty-five million, six hundred thirteen thousand, nine hundred ninety-two".