256321113 has 16 divisors (see below), whose sum is σ = 353213952. Its totient is φ = 165168000.

The previous prime is 256321099. The next prime is 256321123. The reversal of 256321113 is 311123652.

It is not a de Polignac number, because 256321113 - 2⁵ = 256321081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256321123) 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, 136803 + ... + 138663.

It is an arithmetic number, because the mean of its divisors is an integer number (22075872).

Almost surely, 2^256321113 is an apocalyptic number.

It is an amenable number.

256321113 is a deficient number, since it is larger than the sum of its proper divisors (96892839).

256321113 is a wasteful number, since it uses less digits than its factorization.

256321113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3376.

The product of its digits is 1080, while the sum is 24.

The square root of 256321113 is about 16010.0316364459. The cubic root of 256321113 is about 635.2257968988.

Adding to 256321113 its reverse (311123652), we get a palindrome (567444765).

The spelling of 256321113 in words is "two hundred fifty-six million, three hundred twenty-one thousand, one hundred thirteen".