55799972 has 12 divisors (see below), whose sum is σ = 98077980. Its totient is φ = 27777696.

The previous prime is 55799971. The next prime is 55799993. The reversal of 55799972 is 27999755.

It can be written as a sum of positive squares in 2 ways, for example, as 29008996 + 26790976 = 5386^2 + 5176^2 .

It is a super-2 number, since 2×55799972² = 6227273750401568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55799971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29543 + ... + 31374.

It is an arithmetic number, because the mean of its divisors is an integer number (8173165).

Almost surely, 2^55799972 is an apocalyptic number.

It is an amenable number.

55799972 is a deficient number, since it is larger than the sum of its proper divisors (42278008).

55799972 is a wasteful number, since it uses less digits than its factorization.

55799972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61150 (or 61148 counting only the distinct ones).

The product of its digits is 1786050, while the sum is 53.

The square root of 55799972 is about 7469.9378846146. The cubic root of 55799972 is about 382.1301695400.

It can be divided in two parts, 5579 and 9972, that added together give a palindrome (15551).

The spelling of 55799972 in words is "fifty-five million, seven hundred ninety-nine thousand, nine hundred seventy-two".