55599 has 8 divisors (see below), whose sum is σ = 76032. Its totient is φ = 36120.

The previous prime is 55589. The next prime is 55603. The reversal of 55599 is 99555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55599 - 2⁸ = 55343 is a prime.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87 + ... + 344.

It is an arithmetic number, because the mean of its divisors is an integer number (9504).

2⁵⁵⁵⁹⁹ is an apocalyptic number.

55599 is a deficient number, since it is larger than the sum of its proper divisors (20433).

55599 is a wasteful number, since it uses less digits than its factorization.

55599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477.

The product of its digits is 10125, while the sum is 33.

The square root of 55599 is about 235.7944019692. The cubic root of 55599 is about 38.1670851218.

Subtracting 55599 from its reverse (99555), we obtain a triangular number (43956 = T₂₉₆).

It can be divided in two parts, 555 and 99, that multiplied together give a palindrome (54945).

The spelling of 55599 in words is "fifty-five thousand, five hundred ninety-nine".