256319111 has 2 divisors, whose sum is σ = 256319112. Its totient is φ = 256319110.

The previous prime is 256319083. The next prime is 256319123. The reversal of 256319111 is 111913652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256319111 - 2²⁶ = 189210247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256319131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128159555 + 128159556.

It is an arithmetic number, because the mean of its divisors is an integer number (128159556).

Almost surely, 2^256319111 is an apocalyptic number.

256319111 is a deficient number, since it is larger than the sum of its proper divisors (1).

256319111 is an equidigital number, since it uses as much as digits as its factorization.

256319111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 29.

The square root of 256319111 is about 16009.9691130245. The cubic root of 256319111 is about 635.2241430808.

It can be divided in two parts, 25 and 6319111, that added together give a palindrome (6319136).

The spelling of 256319111 in words is "two hundred fifty-six million, three hundred nineteen thousand, one hundred eleven".