55538863 has 4 divisors (see below), whose sum is σ = 55554048. Its totient is φ = 55523680.

The previous prime is 55538851. The next prime is 55538893. The reversal of 55538863 is 36883555.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55538863 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 (55538893) 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, 1623 + ... + 10663.

It is an arithmetic number, because the mean of its divisors is an integer number (13888512).

Almost surely, 2^55538863 is an apocalyptic number.

55538863 is a deficient number, since it is larger than the sum of its proper divisors (15185).

55538863 is an equidigital number, since it uses as much as digits as its factorization.

55538863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15184.

The product of its digits is 432000, while the sum is 43.

The square root of 55538863 is about 7452.4400702052. The cubic root of 55538863 is about 381.5331939440.

The spelling of 55538863 in words is "fifty-five million, five hundred thirty-eight thousand, eight hundred sixty-three".