55332880 has 20 divisors (see below), whose sum is σ = 128649132. Its totient is φ = 22133120.

The previous prime is 55332857. The next prime is 55332887. The reversal of 55332880 is 8823355.

It can be written as a sum of positive squares in 2 ways, for example, as 31674384 + 23658496 = 5628^2 + 4864^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (55332887) 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, 345751 + ... + 345910.

Almost surely, 2^55332880 is an apocalyptic number.

It is an amenable number.

55332880 is an abundant number, since it is smaller than the sum of its proper divisors (73316252).

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

55332880 is a wasteful number, since it uses less digits than its factorization.

55332880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691674 (or 691668 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 55332880 is about 7438.6073965494. The cubic root of 55332880 is about 381.0609317842.

It can be divided in two parts, 553 and 32880, that added together give a palindrome (33433).

The spelling of 55332880 in words is "fifty-five million, three hundred thirty-two thousand, eight hundred eighty".