256353 has 4 divisors (see below), whose sum is σ = 341808. Its totient is φ = 170900.

The previous prime is 256349. The next prime is 256363. The reversal of 256353 is 353652.

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 256353 - 2² = 256349 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (256313) 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, 42723 + ... + 42728.

It is an arithmetic number, because the mean of its divisors is an integer number (85452).

2²⁵⁶³⁵³ is an apocalyptic number.

It is an amenable number.

256353 is a deficient number, since it is larger than the sum of its proper divisors (85455).

256353 is an equidigital number, since it uses as much as digits as its factorization.

256353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85454.

The product of its digits is 2700, while the sum is 24.

The square root of 256353 is about 506.3131442102. The cubic root of 256353 is about 63.5252137043.

The spelling of 256353 in words is "two hundred fifty-six thousand, three hundred fifty-three".