256951847 has 2 divisors, whose sum is σ = 256951848. Its totient is φ = 256951846.

The previous prime is 256951843. The next prime is 256951873. The reversal of 256951847 is 748159652.

It is a happy number.

256951847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256951847 - 2² = 256951843 is a prime.

It is a super-2 number, since 2×256951847² = 132048503353422818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256951843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128475923 + 128475924.

It is an arithmetic number, because the mean of its divisors is an integer number (128475924).

Almost surely, 2^256951847 is an apocalyptic number.

256951847 is a deficient number, since it is larger than the sum of its proper divisors (1).

256951847 is an equidigital number, since it uses as much as digits as its factorization.

256951847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 47.

The square root of 256951847 is about 16029.7176207193. The cubic root of 256951847 is about 635.7464073104.

The spelling of 256951847 in words is "two hundred fifty-six million, nine hundred fifty-one thousand, eight hundred forty-seven".