256162031 has 2 divisors, whose sum is σ = 256162032. Its totient is φ = 256162030.

The previous prime is 256162019. The next prime is 256162057. The reversal of 256162031 is 130261652.

It is an a-pointer prime, because the next prime (256162057) can be obtained adding 256162031 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256162031 - 2¹⁸ = 255899887 is a prime.

It is a super-2 number, since 2×256162031² = 131237972252089922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256162061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128081015 + 128081016.

It is an arithmetic number, because the mean of its divisors is an integer number (128081016).

Almost surely, 2^256162031 is an apocalyptic number.

256162031 is a deficient number, since it is larger than the sum of its proper divisors (1).

256162031 is an equidigital number, since it uses as much as digits as its factorization.

256162031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 256162031 is about 16005.0626677936. The cubic root of 256162031 is about 635.0943551277.

The spelling of 256162031 in words is "two hundred fifty-six million, one hundred sixty-two thousand, thirty-one".