55471872 has 36 divisors (see below), whose sum is σ = 147638120. Its totient is φ = 18490368.

The previous prime is 55471853. The next prime is 55471873. The reversal of 55471872 is 27817455.

It is a self number, because there is not a number n which added to its sum of digits gives 55471872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55471873) 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, 35347 + ... + 36882.

Almost surely, 2^55471872 is an apocalyptic number.

It is an amenable number.

55471872 is an abundant number, since it is smaller than the sum of its proper divisors (92166248).

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

55471872 is an equidigital number, since it uses as much as digits as its factorization.

55471872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72248 (or 72234 counting only the distinct ones).

The product of its digits is 78400, while the sum is 39.

The square root of 55471872 is about 7447.9441458701. The cubic root of 55471872 is about 381.3797303917.

The spelling of 55471872 in words is "fifty-five million, four hundred seventy-one thousand, eight hundred seventy-two".