256674233 has 2 divisors, whose sum is σ = 256674234. Its totient is φ = 256674232.

The previous prime is 256674167. The next prime is 256674241. The reversal of 256674233 is 332476652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256416169 + 258064 = 16013^2 + 508^2 .

It is a cyclic number.

It is not a de Polignac number, because 256674233 - 2¹⁸ = 256412089 is a prime.

It is a super-2 number, since 2×256674233² = 131763323772276578, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (256674293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128337116 + 128337117.

It is an arithmetic number, because the mean of its divisors is an integer number (128337117).

Almost surely, 2^256674233 is an apocalyptic number.

It is an amenable number.

256674233 is a deficient number, since it is larger than the sum of its proper divisors (1).

256674233 is an equidigital number, since it uses as much as digits as its factorization.

256674233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 38.

The square root of 256674233 is about 16021.0559264987. The cubic root of 256674233 is about 635.5173686730.

The spelling of 256674233 in words is "two hundred fifty-six million, six hundred seventy-four thousand, two hundred thirty-three".