256343465 has 16 divisors (see below), whose sum is σ = 352716672. Its totient is φ = 175198464.

The previous prime is 256343449. The next prime is 256343467. The reversal of 256343465 is 564343652.

It is a happy number.

It is not a de Polignac number, because 256343465 - 2⁴ = 256343449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256343467) 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, 1184 + ... + 22673.

It is an arithmetic number, because the mean of its divisors is an integer number (22044792).

Almost surely, 2^256343465 is an apocalyptic number.

It is an amenable number.

256343465 is a deficient number, since it is larger than the sum of its proper divisors (96373207).

256343465 is a wasteful number, since it uses less digits than its factorization.

256343465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24176.

The product of its digits is 259200, while the sum is 38.

The square root of 256343465 is about 16010.7296835591. The cubic root of 256343465 is about 635.2442609186.

The spelling of 256343465 in words is "two hundred fifty-six million, three hundred forty-three thousand, four hundred sixty-five".