256276213 has 2 divisors, whose sum is σ = 256276214. Its totient is φ = 256276212.

The previous prime is 256276211. The next prime is 256276243. The reversal of 256276213 is 312672652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221206129 + 35070084 = 14873^2 + 5922^2 .

It is a cyclic number.

It is not a de Polignac number, because 256276213 - 2¹ = 256276211 is a prime.

Together with 256276211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256276211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128138106 + 128138107.

It is an arithmetic number, because the mean of its divisors is an integer number (128138107).

Almost surely, 2^256276213 is an apocalyptic number.

It is an amenable number.

256276213 is a deficient number, since it is larger than the sum of its proper divisors (1).

256276213 is an equidigital number, since it uses as much as digits as its factorization.

256276213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 256276213 is about 16008.6293292087. The cubic root of 256276213 is about 635.1887037080.

The spelling of 256276213 in words is "two hundred fifty-six million, two hundred seventy-six thousand, two hundred thirteen".