256326213 has 16 divisors (see below), whose sum is σ = 401518656. Its totient is φ = 143399040.

The previous prime is 256326211. The next prime is 256326223. The reversal of 256326213 is 312623652.

It is not a de Polignac number, because 256326213 - 2¹ = 256326211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256326211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298320 + ... + 299177.

It is an arithmetic number, because the mean of its divisors is an integer number (25094916).

Almost surely, 2^256326213 is an apocalyptic number.

It is an amenable number.

256326213 is a deficient number, since it is larger than the sum of its proper divisors (145192443).

256326213 is a wasteful number, since it uses less digits than its factorization.

256326213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597524.

The product of its digits is 12960, while the sum is 30.

The square root of 256326213 is about 16010.1909107918. The cubic root of 256326213 is about 635.2300098825.

Adding to 256326213 its reverse (312623652), we get a palindrome (568949865).

The spelling of 256326213 in words is "two hundred fifty-six million, three hundred twenty-six thousand, two hundred thirteen".