256019 has 2 divisors, whose sum is σ = 256020. Its totient is φ = 256018.

The previous prime is 255989. The next prime is 256021. The reversal of 256019 is 910652.

256019 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 256019 - 2⁸ = 255763 is a prime.

It is a super-2 number, since 2×256019² = 131091456722, which contains 22 as substring.

Together with 256021, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 255985 and 256003.

It is not a weakly prime, because it can be changed into another prime (256049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128009 + 128010.

It is an arithmetic number, because the mean of its divisors is an integer number (128010).

2²⁵⁶⁰¹⁹ is an apocalyptic number.

256019 is a deficient number, since it is larger than the sum of its proper divisors (1).

256019 is an equidigital number, since it uses as much as digits as its factorization.

256019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 256019 is about 505.9832013022. The cubic root of 256019 is about 63.4976129055.

The spelling of 256019 in words is "two hundred fifty-six thousand, nineteen".