55540332 has 36 divisors (see below), whose sum is σ = 141477336. Its totient is φ = 18370560.

The previous prime is 55540327. The next prime is 55540349. The reversal of 55540332 is 23304555.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 55540296 and 55540305.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1173 + ... + 10604.

It is an arithmetic number, because the mean of its divisors is an integer number (3929926).

Almost surely, 2^55540332 is an apocalyptic number.

It is an amenable number.

55540332 is an abundant number, since it is smaller than the sum of its proper divisors (85937004).

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

55540332 is a wasteful number, since it uses less digits than its factorization.

55540332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11918 (or 11913 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The square root of 55540332 is about 7452.5386278771. The cubic root of 55540332 is about 381.5365577587.

Adding to 55540332 its reverse (23304555), we get a palindrome (78844887).

The spelling of 55540332 in words is "fifty-five million, five hundred forty thousand, three hundred thirty-two".