533255221 has 2 divisors, whose sum is σ = 533255222. Its totient is φ = 533255220.

The previous prime is 533255209. The next prime is 533255237. The reversal of 533255221 is 122552335.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 364619025 + 168636196 = 19095^2 + 12986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-533255221 is a prime.

It is a super-2 number, since 2×533255221² = 568722261447517682, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 533255221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (533255251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266627610 + 266627611.

It is an arithmetic number, because the mean of its divisors is an integer number (266627611).

Almost surely, 2^533255221 is an apocalyptic number.

It is an amenable number.

533255221 is a deficient number, since it is larger than the sum of its proper divisors (1).

533255221 is an equidigital number, since it uses as much as digits as its factorization.

533255221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9000, while the sum is 28.

The square root of 533255221 is about 23092.3195240322. The cubic root of 533255221 is about 810.9206728943.

The spelling of 533255221 in words is "five hundred thirty-three million, two hundred fifty-five thousand, two hundred twenty-one".