55619 has 2 divisors, whose sum is σ = 55620.
Its totient is φ = 55618.
The previous prime is 55609. The next prime is 55621. The reversal of 55619 is 91655.
It can be divided in two parts, 556 and 19, that added together give a palindrome (575).
55619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 55619 - 24 = 55603 is a prime.
It is a super-2 number, since 2×556192 = 6186946322, which contains 22 as substring.
Together with 55621, it forms a pair of twin primes.
It is a Chen prime.
It is a nialpdrome in base 16.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 55619.
It is not a weakly prime, because it can be changed into another prime (55609) by changing a digit.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27809 + 27810.
It is an arithmetic number, because the mean of its divisors is an integer number (27810).
255619 is an apocalyptic number.
55619 is a deficient number, since it is larger than the sum of its proper divisors (1).
55619 is an equidigital number, since it uses as much as digits as its factorization.
55619 is an evil number, because the sum of its binary digits is even.
The product of its digits is 1350, while the sum is 26.
The square root of 55619 is about 235.8368079838.
The cubic root of 55619 is about 38.1716610445.
The spelling of 55619 in words is "fifty-five thousand, six hundred nineteen".