256413353 has 4 divisors (see below), whose sum is σ = 293043840. Its totient is φ = 219782868.

The previous prime is 256413337. The next prime is 256413371. The reversal of 256413353 is 353314652.

256413353 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 256413353 - 2⁴ = 256413337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256413323) 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, 18315233 + ... + 18315246.

It is an arithmetic number, because the mean of its divisors is an integer number (73260960).

Almost surely, 2^256413353 is an apocalyptic number.

It is an amenable number.

256413353 is a deficient number, since it is larger than the sum of its proper divisors (36630487).

256413353 is an equidigital number, since it uses as much as digits as its factorization.

256413353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36630486.

The product of its digits is 32400, while the sum is 32.

The square root of 256413353 is about 16012.9120712005. The cubic root of 256413353 is about 635.3019854470.

The spelling of 256413353 in words is "two hundred fifty-six million, four hundred thirteen thousand, three hundred fifty-three".