256433207 has 2 divisors, whose sum is σ = 256433208. Its totient is φ = 256433206.

The previous prime is 256433197. The next prime is 256433213. The reversal of 256433207 is 702334652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256433207 - 2⁶ = 256433143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256433227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128216603 + 128216604.

It is an arithmetic number, because the mean of its divisors is an integer number (128216604).

Almost surely, 2^256433207 is an apocalyptic number.

256433207 is a deficient number, since it is larger than the sum of its proper divisors (1).

256433207 is an equidigital number, since it uses as much as digits as its factorization.

256433207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 32.

The square root of 256433207 is about 16013.5319964085. The cubic root of 256433207 is about 635.3183820971.

Adding to 256433207 its reverse (702334652), we get a palindrome (958767859).

The spelling of 256433207 in words is "two hundred fifty-six million, four hundred thirty-three thousand, two hundred seven".