256330231 has 2 divisors, whose sum is σ = 256330232. Its totient is φ = 256330230.

The previous prime is 256330219. The next prime is 256330247. The reversal of 256330231 is 132033652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256330231 - 2⁹ = 256329719 is a prime.

It is a super-2 number, since 2×256330231² = 131410374649026722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256330196 and 256330205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256330211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128165115 + 128165116.

It is an arithmetic number, because the mean of its divisors is an integer number (128165116).

Almost surely, 2^256330231 is an apocalyptic number.

256330231 is a deficient number, since it is larger than the sum of its proper divisors (1).

256330231 is an equidigital number, since it uses as much as digits as its factorization.

256330231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 256330231 is about 16010.3163928762. The cubic root of 256330231 is about 635.2333290136.

Adding to 256330231 its reverse (132033652), we get a palindrome (388363883).

It can be divided in two parts, 25 and 6330231, that added together give a square (6330256 = 2516²).

The spelling of 256330231 in words is "two hundred fifty-six million, three hundred thirty thousand, two hundred thirty-one".