55173842 has 4 divisors (see below), whose sum is σ = 82760766. Its totient is φ = 27586920.

The previous prime is 55173841. The next prime is 55173851. The reversal of 55173842 is 24837155.

It is a happy number.

55173842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 54449641 + 724201 = 7379^2 + 851^2 .

It is not an unprimeable number, because it can be changed into a prime (55173841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13793459 + ... + 13793462.

Almost surely, 2^55173842 is an apocalyptic number.

55173842 is a deficient number, since it is larger than the sum of its proper divisors (27586924).

55173842 is a wasteful number, since it uses less digits than its factorization.

55173842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27586923.

The product of its digits is 33600, while the sum is 35.

The square root of 55173842 is about 7427.9096655789. The cubic root of 55173842 is about 380.6954991317.

The spelling of 55173842 in words is "fifty-five million, one hundred seventy-three thousand, eight hundred forty-two".