256343255 has 24 divisors (see below), whose sum is σ = 378889488. Its totient is φ = 165435648.

The previous prime is 256343251. The next prime is 256343291. The reversal of 256343255 is 552343652.

It is not a de Polignac number, because 256343255 - 2² = 256343251 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256343251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26609 + ... + 34938.

It is an arithmetic number, because the mean of its divisors is an integer number (15787062).

Almost surely, 2^256343255 is an apocalyptic number.

256343255 is a deficient number, since it is larger than the sum of its proper divisors (122546233).

256343255 is a wasteful number, since it uses less digits than its factorization.

256343255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61583 (or 61576 counting only the distinct ones).

The product of its digits is 108000, while the sum is 35.

The square root of 256343255 is about 16010.7231254556. The cubic root of 256343255 is about 635.2440874516.

The spelling of 256343255 in words is "two hundred fifty-six million, three hundred forty-three thousand, two hundred fifty-five".