55565123 has 4 divisors (see below), whose sum is σ = 55588680. Its totient is φ = 55541568.

The previous prime is 55565119. The next prime is 55565137. The reversal of 55565123 is 32156555.

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

It is a cyclic number.

It is not a de Polignac number, because 55565123 - 2² = 55565119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55565123.

It is not an unprimeable number, because it can be changed into a prime (55565143) 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, 7790 + ... + 13107.

It is an arithmetic number, because the mean of its divisors is an integer number (13897170).

Almost surely, 2^55565123 is an apocalyptic number.

55565123 is a deficient number, since it is larger than the sum of its proper divisors (23557).

55565123 is a wasteful number, since it uses less digits than its factorization.

55565123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23556.

The product of its digits is 22500, while the sum is 32.

The square root of 55565123 is about 7454.2017010542. The cubic root of 55565123 is about 381.5933169070.

The spelling of 55565123 in words is "fifty-five million, five hundred sixty-five thousand, one hundred twenty-three".