55644263 has 4 divisors (see below), whose sum is σ = 57148200. Its totient is φ = 54140328.

The previous prime is 55644227. The next prime is 55644269. The reversal of 55644263 is 36244655.

It is a happy number.

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 55644263 - 2⁸ = 55644007 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 (55644269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751913 + ... + 751986.

It is an arithmetic number, because the mean of its divisors is an integer number (14287050).

Almost surely, 2^55644263 is an apocalyptic number.

55644263 is a deficient number, since it is larger than the sum of its proper divisors (1503937).

55644263 is a wasteful number, since it uses less digits than its factorization.

55644263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503936.

The product of its digits is 86400, while the sum is 35.

The square root of 55644263 is about 7459.5082277587. The cubic root of 55644263 is about 381.7743955372.

The spelling of 55644263 in words is "fifty-five million, six hundred forty-four thousand, two hundred sixty-three".