55183872 has 80 divisors (see below), whose sum is σ = 151142112. Its totient is φ = 17879040.

The previous prime is 55183867. The next prime is 55183879. The reversal of 55183872 is 27838155.

It is a self number, because there is not a number n which added to its sum of digits gives 55183872.

It is not an unprimeable number, because it can be changed into a prime (55183879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56347 + ... + 57317.

Almost surely, 2^55183872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55183872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75571056).

55183872 is an abundant number, since it is smaller than the sum of its proper divisors (95958240).

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

55183872 is an equidigital number, since it uses as much as digits as its factorization.

55183872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029 (or 1013 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 55183872 is about 7428.5847911968. The cubic root of 55183872 is about 380.7185664910.

The spelling of 55183872 in words is "fifty-five million, one hundred eighty-three thousand, eight hundred seventy-two".