55543872 has 28 divisors (see below), whose sum is σ = 146960336. Its totient is φ = 18514560.

The previous prime is 55543861. The next prime is 55543877. The reversal of 55543872 is 27834555.

It is a self number, because there is not a number n which added to its sum of digits gives 55543872.

It is not an unprimeable number, because it can be changed into a prime (55543877) 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, 144454 + ... + 144837.

Almost surely, 2^55543872 is an apocalyptic number.

It is an amenable number.

55543872 is an abundant number, since it is smaller than the sum of its proper divisors (91416464).

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

55543872 is a wasteful number, since it uses less digits than its factorization.

55543872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289306 (or 289296 counting only the distinct ones).

The product of its digits is 168000, while the sum is 39.

The square root of 55543872 is about 7452.7761270549. The cubic root of 55543872 is about 381.5446636442.

The spelling of 55543872 in words is "fifty-five million, five hundred forty-three thousand, eight hundred seventy-two".