256136099 has 2 divisors, whose sum is σ = 256136100. Its totient is φ = 256136098.

The previous prime is 256136087. The next prime is 256136107. The reversal of 256136099 is 990631652.

256136099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256136099 is a prime.

It is not a weakly prime, because it can be changed into another prime (256136009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128068049 + 128068050.

It is an arithmetic number, because the mean of its divisors is an integer number (128068050).

Almost surely, 2^256136099 is an apocalyptic number.

256136099 is a deficient number, since it is larger than the sum of its proper divisors (1).

256136099 is an equidigital number, since it uses as much as digits as its factorization.

256136099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 256136099 is about 16004.2525286250. The cubic root of 256136099 is about 635.0729236110.

The spelling of 256136099 in words is "two hundred fifty-six million, one hundred thirty-six thousand, ninety-nine".