256154131 has 2 divisors, whose sum is σ = 256154132. Its totient is φ = 256154130.

The previous prime is 256154117. The next prime is 256154149. The reversal of 256154131 is 131451652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256154131 - 2¹⁷ = 256023059 is a prime.

It is a super-2 number, since 2×256154131² = 131229877656730322, 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 256154131.

It is not a weakly prime, because it can be changed into another prime (256154161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128077065 + 128077066.

It is an arithmetic number, because the mean of its divisors is an integer number (128077066).

Almost surely, 2^256154131 is an apocalyptic number.

256154131 is a deficient number, since it is larger than the sum of its proper divisors (1).

256154131 is an equidigital number, since it uses as much as digits as its factorization.

256154131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 256154131 is about 16004.8158689814. The cubic root of 256154131 is about 635.0878263213.

The spelling of 256154131 in words is "two hundred fifty-six million, one hundred fifty-four thousand, one hundred thirty-one".