221255033 has 2 divisors, whose sum is σ = 221255034. Its totient is φ = 221255032.

The previous prime is 221255011. The next prime is 221255039. The reversal of 221255033 is 330552122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205865104 + 15389929 = 14348^2 + 3923^2 .

It is a cyclic number.

It is not a de Polignac number, because 221255033 - 2¹⁰ = 221254009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221255039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110627516 + 110627517.

It is an arithmetic number, because the mean of its divisors is an integer number (110627517).

Almost surely, 2^221255033 is an apocalyptic number.

It is an amenable number.

221255033 is a deficient number, since it is larger than the sum of its proper divisors (1).

221255033 is an equidigital number, since it uses as much as digits as its factorization.

221255033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 221255033 is about 14874.6439621256. The cubic root of 221255033 is about 604.8268365835.

The spelling of 221255033 in words is "two hundred twenty-one million, two hundred fifty-five thousand, thirty-three".