256630151 has 2 divisors, whose sum is σ = 256630152. Its totient is φ = 256630150.

The previous prime is 256630123. The next prime is 256630219. The reversal of 256630151 is 151036652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256630151 is a prime.

It is a Sophie Germain 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 (256630051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128315075 + 128315076.

It is an arithmetic number, because the mean of its divisors is an integer number (128315076).

Almost surely, 2^256630151 is an apocalyptic number.

256630151 is a deficient number, since it is larger than the sum of its proper divisors (1).

256630151 is an equidigital number, since it uses as much as digits as its factorization.

256630151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 256630151 is about 16019.6801154080. The cubic root of 256630151 is about 635.4809847058.

The spelling of 256630151 in words is "two hundred fifty-six million, six hundred thirty thousand, one hundred fifty-one".