256100587 has 2 divisors, whose sum is σ = 256100588. Its totient is φ = 256100586.

The previous prime is 256100557. The next prime is 256100629. The reversal of 256100587 is 785001652.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256100587 is a prime.

It is not a weakly prime, because it can be changed into another prime (256100527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128050293 + 128050294.

It is an arithmetic number, because the mean of its divisors is an integer number (128050294).

Almost surely, 2^256100587 is an apocalyptic number.

256100587 is a deficient number, since it is larger than the sum of its proper divisors (1).

256100587 is an equidigital number, since it uses as much as digits as its factorization.

256100587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 256100587 is about 16003.1430350416. The cubic root of 256100587 is about 635.0435723506.

The spelling of 256100587 in words is "two hundred fifty-six million, one hundred thousand, five hundred eighty-seven".