55656239 has 4 divisors (see below), whose sum is σ = 56281680. Its totient is φ = 55030800.

The previous prime is 55656221. The next prime is 55656247. The reversal of 55656239 is 93265655.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55656239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55656196 and 55656205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55656269) 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, 312587 + ... + 312764.

It is an arithmetic number, because the mean of its divisors is an integer number (14070420).

Almost surely, 2^55656239 is an apocalyptic number.

55656239 is a deficient number, since it is larger than the sum of its proper divisors (625441).

55656239 is an equidigital number, since it uses as much as digits as its factorization.

55656239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625440.

The product of its digits is 243000, while the sum is 41.

The square root of 55656239 is about 7460.3109184537. The cubic root of 55656239 is about 381.8017826204.

The spelling of 55656239 in words is "fifty-five million, six hundred fifty-six thousand, two hundred thirty-nine".