55173642 has 24 divisors (see below), whose sum is σ = 115360224. Its totient is φ = 17590584.

The previous prime is 55173641. The next prime is 55173647. The reversal of 55173642 is 24637155.

It is not an unprimeable number, because it can be changed into a prime (55173641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5518 + ... + 11865.

It is an arithmetic number, because the mean of its divisors is an integer number (4806676).

Almost surely, 2^55173642 is an apocalyptic number.

55173642 is an abundant number, since it is smaller than the sum of its proper divisors (60186582).

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

55173642 is a wasteful number, since it uses less digits than its factorization.

55173642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17434 (or 17411 counting only the distinct ones).

The product of its digits is 25200, while the sum is 33.

The square root of 55173642 is about 7427.8962028289. The cubic root of 55173642 is about 380.6950391360.

The spelling of 55173642 in words is "fifty-five million, one hundred seventy-three thousand, six hundred forty-two".