256253366 has 4 divisors (see below), whose sum is σ = 384380052. Its totient is φ = 128126682.

The previous prime is 256253363. The next prime is 256253401. The reversal of 256253366 is 663352652.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256253363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64063340 + ... + 64063343.

It is an arithmetic number, because the mean of its divisors is an integer number (96095013).

Almost surely, 2^256253366 is an apocalyptic number.

256253366 is a deficient number, since it is larger than the sum of its proper divisors (128126686).

256253366 is a wasteful number, since it uses less digits than its factorization.

256253366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128126685.

The product of its digits is 194400, while the sum is 38.

The square root of 256253366 is about 16007.9157294134. The cubic root of 256253366 is about 635.1698274762.

The spelling of 256253366 in words is "two hundred fifty-six million, two hundred fifty-three thousand, three hundred sixty-six".