55775972 has 12 divisors (see below), whose sum is σ = 111552000. Its totient is φ = 23903976.

The previous prime is 55775969. The next prime is 55776013. The reversal of 55775972 is 27957755.

55775972 is an admirable number.

It is a super-2 number, since 2×55775972² = 6221918105089568, 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, 995972 + ... + 996027.

It is an arithmetic number, because the mean of its divisors is an integer number (9296000).

Almost surely, 2^55775972 is an apocalyptic number.

It is an amenable number.

55775972 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55775972 is a wasteful number, since it uses less digits than its factorization.

55775972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992010 (or 1992008 counting only the distinct ones).

The product of its digits is 771750, while the sum is 47.

The square root of 55775972 is about 7468.3312727811. The cubic root of 55775972 is about 382.0753759686.

The spelling of 55775972 in words is "fifty-five million, seven hundred seventy-five thousand, nine hundred seventy-two".