256822045 has 4 divisors (see below), whose sum is σ = 308186460. Its totient is φ = 205457632.

The previous prime is 256822001. The next prime is 256822051. The reversal of 256822045 is 540228652.

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

It can be written as a sum of positive squares in 2 ways, for example, as 144504441 + 112317604 = 12021^2 + 10598^2 .

It is a cyclic number.

It is not a de Polignac number, because 256822045 - 2¹³ = 256813853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256822045.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25682200 + ... + 25682209.

It is an arithmetic number, because the mean of its divisors is an integer number (77046615).

Almost surely, 2^256822045 is an apocalyptic number.

It is an amenable number.

256822045 is a deficient number, since it is larger than the sum of its proper divisors (51364415).

256822045 is an equidigital number, since it uses as much as digits as its factorization.

256822045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51364414.

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 256822045 is about 16025.6683167973. The cubic root of 256822045 is about 635.6393378918.

The spelling of 256822045 in words is "two hundred fifty-six million, eight hundred twenty-two thousand, forty-five".