256267433 has 2 divisors, whose sum is σ = 256267434. Its totient is φ = 256267432.

The previous prime is 256267369. The next prime is 256267441. The reversal of 256267433 is 334762652.

It is a happy number.

256267433 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 248472169 + 7795264 = 15763^2 + 2792^2 .

It is a cyclic number.

It is not a de Polignac number, because 256267433 - 2⁶ = 256267369 is a prime.

It is not a weakly prime, because it can be changed into another prime (256267733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128133716 + 128133717.

It is an arithmetic number, because the mean of its divisors is an integer number (128133717).

Almost surely, 2^256267433 is an apocalyptic number.

It is an amenable number.

256267433 is a deficient number, since it is larger than the sum of its proper divisors (1).

256267433 is an equidigital number, since it uses as much as digits as its factorization.

256267433 is an evil number, because the sum of its binary digits is even.

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

The square root of 256267433 is about 16008.3550997596. The cubic root of 256267433 is about 635.1814497892.

The spelling of 256267433 in words is "two hundred fifty-six million, two hundred sixty-seven thousand, four hundred thirty-three".