256850431 has 2 divisors, whose sum is σ = 256850432. Its totient is φ = 256850430.

The previous prime is 256850413. The next prime is 256850459. The reversal of 256850431 is 134058652.

Together with previous prime (256850413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256850431 - 2⁹ = 256849919 is a prime.

It is a super-2 number, since 2×256850431² = 131944287809771522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256850401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128425215 + 128425216.

It is an arithmetic number, because the mean of its divisors is an integer number (128425216).

Almost surely, 2^256850431 is an apocalyptic number.

256850431 is a deficient number, since it is larger than the sum of its proper divisors (1).

256850431 is an equidigital number, since it uses as much as digits as its factorization.

256850431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 256850431 is about 16026.5539340184. The cubic root of 256850431 is about 635.6627556551.

The spelling of 256850431 in words is "two hundred fifty-six million, eight hundred fifty thousand, four hundred thirty-one".