256350431 has 2 divisors, whose sum is σ = 256350432. Its totient is φ = 256350430.

The previous prime is 256350421. The next prime is 256350449. The reversal of 256350431 is 134053652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256350431 - 2¹⁴ = 256334047 is a prime.

It is a super-2 number, since 2×256350431² = 131431086947771522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 256350394 and 256350403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256350421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128175215 + 128175216.

It is an arithmetic number, because the mean of its divisors is an integer number (128175216).

Almost surely, 2^256350431 is an apocalyptic number.

256350431 is a deficient number, since it is larger than the sum of its proper divisors (1).

256350431 is an equidigital number, since it uses as much as digits as its factorization.

256350431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 256350431 is about 16010.9472236967. The cubic root of 256350431 is about 635.2500150103.

The spelling of 256350431 in words is "two hundred fifty-six million, three hundred fifty thousand, four hundred thirty-one".