256745333 has 8 divisors (see below), whose sum is σ = 279233976. Its totient is φ = 234648000.

The previous prime is 256745287. The next prime is 256745341. The reversal of 256745333 is 333547652.

It can be written as a sum of positive squares in 4 ways, for example, as 14569489 + 242175844 = 3817^2 + 15562^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256745333 - 2⁸ = 256745077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256745353) 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 7 ways as a sum of consecutive naturals, for example, 96458 + ... + 99083.

It is an arithmetic number, because the mean of its divisors is an integer number (34904247).

Almost surely, 2^256745333 is an apocalyptic number.

It is an amenable number.

256745333 is a deficient number, since it is larger than the sum of its proper divisors (22488643).

256745333 is a wasteful number, since it uses less digits than its factorization.

256745333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195655.

The product of its digits is 226800, while the sum is 38.

The square root of 256745333 is about 16023.2747277203. The cubic root of 256745333 is about 635.5760437139.

The spelling of 256745333 in words is "two hundred fifty-six million, seven hundred forty-five thousand, three hundred thirty-three".