55044155 has 4 divisors (see below), whose sum is σ = 66052992. Its totient is φ = 44035320.

The previous prime is 55044151. The next prime is 55044161. The reversal of 55044155 is 55144055.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55044155 - 2² = 55044151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55044151) 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, 5504411 + ... + 5504420.

It is an arithmetic number, because the mean of its divisors is an integer number (16513248).

Almost surely, 2^55044155 is an apocalyptic number.

55044155 is a deficient number, since it is larger than the sum of its proper divisors (11008837).

55044155 is a wasteful number, since it uses less digits than its factorization.

55044155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11008836.

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 55044155 is about 7419.1748193448. The cubic root of 55044155 is about 380.3969881669.

The spelling of 55044155 in words is "fifty-five million, forty-four thousand, one hundred fifty-five".