55564189 has 4 divisors (see below), whose sum is σ = 58488640. Its totient is φ = 52639740.

The previous prime is 55564163. The next prime is 55564207. The reversal of 55564189 is 98146555.

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 55564189 - 2²³ = 47175581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55564139) 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, 1462197 + ... + 1462234.

It is an arithmetic number, because the mean of its divisors is an integer number (14622160).

Almost surely, 2^55564189 is an apocalyptic number.

It is an amenable number.

55564189 is a deficient number, since it is larger than the sum of its proper divisors (2924451).

55564189 is a wasteful number, since it uses less digits than its factorization.

55564189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2924450.

The product of its digits is 216000, while the sum is 43.

The square root of 55564189 is about 7454.1390515605. The cubic root of 55564189 is about 381.5911788143.

The spelling of 55564189 in words is "fifty-five million, five hundred sixty-four thousand, one hundred eighty-nine".