55646239 has 4 divisors (see below), whose sum is σ = 60705000. Its totient is φ = 50587480.

The previous prime is 55646233. The next prime is 55646251. The reversal of 55646239 is 93264655.

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 55646239 - 2⁵ = 55646207 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55646233) 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, 2529364 + ... + 2529385.

It is an arithmetic number, because the mean of its divisors is an integer number (15176250).

Almost surely, 2^55646239 is an apocalyptic number.

55646239 is a deficient number, since it is larger than the sum of its proper divisors (5058761).

55646239 is a wasteful number, since it uses less digits than its factorization.

55646239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5058760.

The product of its digits is 194400, while the sum is 40.

The square root of 55646239 is about 7459.6406749923. The cubic root of 55646239 is about 381.7789145851.

The spelling of 55646239 in words is "fifty-five million, six hundred forty-six thousand, two hundred thirty-nine".