55556239 has 4 divisors (see below), whose sum is σ = 55575856. Its totient is φ = 55536624.

The previous prime is 55556231. The next prime is 55556251. The reversal of 55556239 is 93265555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93265555 = 5 ⋅18653111.

It is a cyclic number.

It is not a de Polignac number, because 55556239 - 2³ = 55556231 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 (55556231) 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, 4659 + ... + 11524.

It is an arithmetic number, because the mean of its divisors is an integer number (13893964).

Almost surely, 2^55556239 is an apocalyptic number.

55556239 is a deficient number, since it is larger than the sum of its proper divisors (19617).

55556239 is a wasteful number, since it uses less digits than its factorization.

55556239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19616.

The product of its digits is 202500, while the sum is 40.

The square root of 55556239 is about 7453.6057717054. The cubic root of 55556239 is about 381.5729788752.

The spelling of 55556239 in words is "fifty-five million, five hundred fifty-six thousand, two hundred thirty-nine".