256224533 has 4 divisors (see below), whose sum is σ = 256494348. Its totient is φ = 255954720.

The previous prime is 256224523. The next prime is 256224581. The reversal of 256224533 is 335422652.

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 106357969 + 149866564 = 10313^2 + 12242^2 .

It is a cyclic number.

It is not a de Polignac number, because 256224533 - 2¹⁶ = 256158997 is a prime.

It is a super-2 number, since 2×256224533² = 131302022622136178, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256224533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256224523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133478 + ... + 135383.

It is an arithmetic number, because the mean of its divisors is an integer number (64123587).

Almost surely, 2^256224533 is an apocalyptic number.

It is an amenable number.

256224533 is a deficient number, since it is larger than the sum of its proper divisors (269815).

256224533 is an equidigital number, since it uses as much as digits as its factorization.

256224533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269814.

The product of its digits is 43200, while the sum is 32.

The square root of 256224533 is about 16007.0151183786. The cubic root of 256224533 is about 635.1460039992.

The spelling of 256224533 in words is "two hundred fifty-six million, two hundred twenty-four thousand, five hundred thirty-three".