256134331 has 2 divisors, whose sum is σ = 256134332. Its totient is φ = 256134330.

The previous prime is 256134317. The next prime is 256134343. The reversal of 256134331 is 133431652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256134331 - 2⁵ = 256134299 is a prime.

It is a super-2 number, since 2×256134331² = 131209591033635122, 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 256134331.

It is not a weakly prime, because it can be changed into another prime (256134311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128067165 + 128067166.

It is an arithmetic number, because the mean of its divisors is an integer number (128067166).

Almost surely, 2^256134331 is an apocalyptic number.

256134331 is a deficient number, since it is larger than the sum of its proper divisors (1).

256134331 is an equidigital number, since it uses as much as digits as its factorization.

256134331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 28.

The square root of 256134331 is about 16004.1972932103. The cubic root of 256134331 is about 635.0714623937.

Adding to 256134331 its reverse (133431652), we get a palindrome (389565983).

The spelling of 256134331 in words is "two hundred fifty-six million, one hundred thirty-four thousand, three hundred thirty-one".