256211113 has 4 divisors (see below), whose sum is σ = 257642640. Its totient is φ = 254779588.

The previous prime is 256211057. The next prime is 256211159. The reversal of 256211113 is 311112652.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256211113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256212113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715495 + ... + 715852.

It is an arithmetic number, because the mean of its divisors is an integer number (64410660).

Almost surely, 2^256211113 is an apocalyptic number.

It is an amenable number.

256211113 is a deficient number, since it is larger than the sum of its proper divisors (1431527).

256211113 is a wasteful number, since it uses less digits than its factorization.

256211113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431526.

The product of its digits is 360, while the sum is 22.

The square root of 256211113 is about 16006.5959216818. The cubic root of 256211113 is about 635.1349150165.

Adding to 256211113 its reverse (311112652), we get a palindrome (567323765).

The spelling of 256211113 in words is "two hundred fifty-six million, two hundred eleven thousand, one hundred thirteen".