55899 has 6 divisors (see below), whose sum is σ = 80756. Its totient is φ = 37260.

The previous prime is 55897. The next prime is 55901. The reversal of 55899 is 99855.

55899 is nontrivially palindromic in base 2.

It is an interprime number because it is at equal distance from previous prime (55897) and next prime (55901).

It is not a de Polignac number, because 55899 - 2¹ = 55897 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55897) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3097 + ... + 3114.

2⁵⁵⁸⁹⁹ is an apocalyptic number.

55899 is a deficient number, since it is larger than the sum of its proper divisors (24857).

55899 is a wasteful number, since it uses less digits than its factorization.

55899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6217 (or 6214 counting only the distinct ones).

The product of its digits is 16200, while the sum is 36.

The square root of 55899 is about 236.4296935666. The cubic root of 55899 is about 38.2356090936.

Subtracting 55899 from its reverse (99855), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 55899 in words is "fifty-five thousand, eight hundred ninety-nine".