256086031 has 2 divisors, whose sum is σ = 256086032. Its totient is φ = 256086030.

The previous prime is 256086029. The next prime is 256086049. The reversal of 256086031 is 130680652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256086031 - 2¹ = 256086029 is a prime.

It is a super-2 number, since 2×256086031² = 131160110546665922, which contains 22 as substring.

Together with 256086029, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 256085984 and 256086002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256086001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128043015 + 128043016.

It is an arithmetic number, because the mean of its divisors is an integer number (128043016).

Almost surely, 2^256086031 is an apocalyptic number.

256086031 is a deficient number, since it is larger than the sum of its proper divisors (1).

256086031 is an equidigital number, since it uses as much as digits as its factorization.

256086031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 256086031 is about 16002.6882429172. The cubic root of 256086031 is about 635.0315407897.

The spelling of 256086031 in words is "two hundred fifty-six million, eighty-six thousand, thirty-one".