55521055 has 4 divisors (see below), whose sum is σ = 66625272. Its totient is φ = 44416840.

The previous prime is 55521023. The next prime is 55521071. The reversal of 55521055 is 55012555.

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 55521055 - 2⁵ = 55521023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5552101 + ... + 5552110.

It is an arithmetic number, because the mean of its divisors is an integer number (16656318).

Almost surely, 2^55521055 is an apocalyptic number.

55521055 is a deficient number, since it is larger than the sum of its proper divisors (11104217).

55521055 is a wasteful number, since it uses less digits than its factorization.

55521055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11104216.

The product of its (nonzero) digits is 6250, while the sum is 28.

The square root of 55521055 is about 7451.2451979518. The cubic root of 55521055 is about 381.4924112737.

The spelling of 55521055 in words is "fifty-five million, five hundred twenty-one thousand, fifty-five".