256811214 has 32 divisors (see below), whose sum is σ = 593277696. Its totient is φ = 73243520.

The previous prime is 256811207. The next prime is 256811237. The reversal of 256811214 is 412118652.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113322 + ... + 115565.

It is an arithmetic number, because the mean of its divisors is an integer number (18539928).

Almost surely, 2^256811214 is an apocalyptic number.

256811214 is an abundant number, since it is smaller than the sum of its proper divisors (336466482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256811214 is a wasteful number, since it uses less digits than its factorization.

256811214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228920.

The product of its digits is 3840, while the sum is 30.

The square root of 256811214 is about 16025.3303866098. The cubic root of 256811214 is about 635.6304021241.

Adding to 256811214 its reverse (412118652), we get a palindrome (668929866).

The spelling of 256811214 in words is "two hundred fifty-six million, eight hundred eleven thousand, two hundred fourteen".