256012213 has 8 divisors (see below), whose sum is σ = 276770720. Its totient is φ = 235982160.

The previous prime is 256012193. The next prime is 256012223. The reversal of 256012213 is 312210652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256012213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256012223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181383 + ... + 182788.

It is an arithmetic number, because the mean of its divisors is an integer number (34596340).

Almost surely, 2^256012213 is an apocalyptic number.

It is an amenable number.

256012213 is a deficient number, since it is larger than the sum of its proper divisors (20758507).

256012213 is a wasteful number, since it uses less digits than its factorization.

256012213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364227.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 256012213 is about 16000.3816516982. The cubic root of 256012213 is about 634.9705179856.

Adding to 256012213 its reverse (312210652), we get a palindrome (568222865).

The spelling of 256012213 in words is "two hundred fifty-six million, twelve thousand, two hundred thirteen".