55561173 has 4 divisors (see below), whose sum is σ = 74081568. Its totient is φ = 37040780.

The previous prime is 55561171. The next prime is 55561193. The reversal of 55561173 is 37116555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55561173 - 2¹ = 55561171 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55561171) by changing a digit.

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, 9260193 + ... + 9260198.

It is an arithmetic number, because the mean of its divisors is an integer number (18520392).

Almost surely, 2^55561173 is an apocalyptic number.

It is an amenable number.

55561173 is a deficient number, since it is larger than the sum of its proper divisors (18520395).

55561173 is a wasteful number, since it uses less digits than its factorization.

55561173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18520394.

The product of its digits is 15750, while the sum is 33.

The square root of 55561173 is about 7453.9367451032. The cubic root of 55561173 is about 381.5842744883.

The spelling of 55561173 in words is "fifty-five million, five hundred sixty-one thousand, one hundred seventy-three".