256413103 has 4 divisors (see below), whose sum is σ = 256974640. Its totient is φ = 255851568.

The previous prime is 256413089. The next prime is 256413109. The reversal of 256413103 is 301314652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256413103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256413109) 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, 280083 + ... + 280996.

It is an arithmetic number, because the mean of its divisors is an integer number (64243660).

Almost surely, 2^256413103 is an apocalyptic number.

256413103 is a deficient number, since it is larger than the sum of its proper divisors (561537).

256413103 is an equidigital number, since it uses as much as digits as its factorization.

256413103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561536.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 256413103 is about 16012.9042649983. The cubic root of 256413103 is about 635.3017789763.

Adding to 256413103 its reverse (301314652), we get a palindrome (557727755).

The spelling of 256413103 in words is "two hundred fifty-six million, four hundred thirteen thousand, one hundred three".