55888891 has 4 divisors (see below), whose sum is σ = 55979800. Its totient is φ = 55797984.

The previous prime is 55888883. The next prime is 55888901. The reversal of 55888891 is 19888855.

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 55888891 - 2³ = 55888883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55898891) 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, 44526 + ... + 45763.

It is an arithmetic number, because the mean of its divisors is an integer number (13994950).

Almost surely, 2^55888891 is an apocalyptic number.

55888891 is a deficient number, since it is larger than the sum of its proper divisors (90909).

55888891 is an equidigital number, since it uses as much as digits as its factorization.

55888891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90908.

The product of its digits is 921600, while the sum is 52.

The square root of 55888891 is about 7475.8873051966. The cubic root of 55888891 is about 382.3330406085. Note that the first 3 decimals are identical.

The spelling of 55888891 in words is "fifty-five million, eight hundred eighty-eight thousand, eight hundred ninety-one".