255919 has 2 divisors, whose sum is σ = 255920. Its totient is φ = 255918.

The previous prime is 255917. The next prime is 255923. The reversal of 255919 is 919552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255919 - 2¹ = 255917 is a prime.

It is a super-2 number, since 2×255919² = 130989069122, which contains 22 as substring.

Together with 255917, it forms a pair of twin primes.

255919 is a lucky number.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127959 + 127960.

It is an arithmetic number, because the mean of its divisors is an integer number (127960).

2²⁵⁵⁹¹⁹ is an apocalyptic number.

255919 is a deficient number, since it is larger than the sum of its proper divisors (1).

255919 is an equidigital number, since it uses as much as digits as its factorization.

255919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4050, while the sum is 31.

The square root of 255919 is about 505.8843741410. The cubic root of 255919 is about 63.4893445241.

It can be divided in two parts, 25591 and 9, that added together give a square (25600 = 160²).

The spelling of 255919 in words is "two hundred fifty-five thousand, nine hundred nineteen".