256673227 has 2 divisors, whose sum is σ = 256673228. Its totient is φ = 256673226.

The previous prime is 256673189. The next prime is 256673231. The reversal of 256673227 is 722376652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256673227 - 2⁷ = 256673099 is a prime.

It is a super-2 number, since 2×256673227² = 131762290917187058, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256673227.

It is not a weakly prime, because it can be changed into another prime (256673237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128336613 + 128336614.

It is an arithmetic number, because the mean of its divisors is an integer number (128336614).

Almost surely, 2^256673227 is an apocalyptic number.

256673227 is a deficient number, since it is larger than the sum of its proper divisors (1).

256673227 is an equidigital number, since it uses as much as digits as its factorization.

256673227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 40.

The square root of 256673227 is about 16021.0245302852. The cubic root of 256673227 is about 635.5165383971.

The spelling of 256673227 in words is "two hundred fifty-six million, six hundred seventy-three thousand, two hundred twenty-seven".