55193863 has 4 divisors (see below), whose sum is σ = 56017720. Its totient is φ = 54370008.

The previous prime is 55193807. The next prime is 55193867. The reversal of 55193863 is 36839155.

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-55193863 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 (55193867) 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, 411828 + ... + 411961.

It is an arithmetic number, because the mean of its divisors is an integer number (14004430).

Almost surely, 2^55193863 is an apocalyptic number.

55193863 is a deficient number, since it is larger than the sum of its proper divisors (823857).

55193863 is an equidigital number, since it uses as much as digits as its factorization.

55193863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823856.

The product of its digits is 97200, while the sum is 40.

The square root of 55193863 is about 7429.2572307062. The cubic root of 55193863 is about 380.7415413779.

The spelling of 55193863 in words is "fifty-five million, one hundred ninety-three thousand, eight hundred sixty-three".