256345151 has 2 divisors, whose sum is σ = 256345152. Its totient is φ = 256345150.

The previous prime is 256345129. The next prime is 256345157. The reversal of 256345151 is 151543652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256345151 - 2⁶ = 256345087 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256345157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128172575 + 128172576.

It is an arithmetic number, because the mean of its divisors is an integer number (128172576).

Almost surely, 2^256345151 is an apocalyptic number.

256345151 is a deficient number, since it is larger than the sum of its proper divisors (1).

256345151 is an equidigital number, since it uses as much as digits as its factorization.

256345151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 32.

The square root of 256345151 is about 16010.7823356637. The cubic root of 256345151 is about 635.2456536067.

The spelling of 256345151 in words is "two hundred fifty-six million, three hundred forty-five thousand, one hundred fifty-one".