256206965 has 8 divisors (see below), whose sum is σ = 351369600. Its totient is φ = 175684752.

The previous prime is 256206931. The next prime is 256207009. The reversal of 256206965 is 569602652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256206965 - 2¹⁰ = 256205941 is a prime.

It is a super-2 number, since 2×256206965² = 131284017829022450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3660065 + ... + 3660134.

It is an arithmetic number, because the mean of its divisors is an integer number (43921200).

Almost surely, 2^256206965 is an apocalyptic number.

It is an amenable number.

256206965 is a deficient number, since it is larger than the sum of its proper divisors (95162635).

256206965 is an equidigital number, since it uses as much as digits as its factorization.

256206965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7320211.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 256206965 is about 16006.4663495726. The cubic root of 256206965 is about 635.1314874345.

The spelling of 256206965 in words is "two hundred fifty-six million, two hundred six thousand, nine hundred sixty-five".