256512995 has 4 divisors (see below), whose sum is σ = 307815600. Its totient is φ = 205210392.

The previous prime is 256512973. The next prime is 256513001. The reversal of 256512995 is 599215652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256512995 - 2¹⁰ = 256511971 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25651295 + ... + 25651304.

It is an arithmetic number, because the mean of its divisors is an integer number (76953900).

Almost surely, 2^256512995 is an apocalyptic number.

256512995 is a deficient number, since it is larger than the sum of its proper divisors (51302605).

256512995 is an equidigital number, since it uses as much as digits as its factorization.

256512995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51302604.

The product of its digits is 243000, while the sum is 44.

The square root of 256512995 is about 16016.0230706627. The cubic root of 256512995 is about 635.3842673844.

The spelling of 256512995 in words is "two hundred fifty-six million, five hundred twelve thousand, nine hundred ninety-five".