55539123 has 4 divisors (see below), whose sum is σ = 74052168. Its totient is φ = 37026080.

The previous prime is 55539103. The next prime is 55539131. The reversal of 55539123 is 32193555.

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 55539123 - 2²⁰ = 54490547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55539103) 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, 9256518 + ... + 9256523.

It is an arithmetic number, because the mean of its divisors is an integer number (18513042).

Almost surely, 2^55539123 is an apocalyptic number.

55539123 is a deficient number, since it is larger than the sum of its proper divisors (18513045).

55539123 is a wasteful number, since it uses less digits than its factorization.

55539123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18513044.

The product of its digits is 20250, while the sum is 33.

The square root of 55539123 is about 7452.4575141359. The cubic root of 55539123 is about 381.5337893138.

The spelling of 55539123 in words is "fifty-five million, five hundred thirty-nine thousand, one hundred twenty-three".