33222181 has 2 divisors, whose sum is σ = 33222182. Its totient is φ = 33222180.

The previous prime is 33222179. The next prime is 33222191. The reversal of 33222181 is 18122233.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33005025 + 217156 = 5745^2 + 466^2 .

It is a cyclic number.

It is not a de Polignac number, because 33222181 - 2¹ = 33222179 is a prime.

It is a super-2 number, since 2×33222181² = 2207426620793522, which contains 22 as substring.

Together with 33222179, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33222121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16611090 + 16611091.

It is an arithmetic number, because the mean of its divisors is an integer number (16611091).

Almost surely, 2^33222181 is an apocalyptic number.

It is an amenable number.

33222181 is a deficient number, since it is larger than the sum of its proper divisors (1).

33222181 is an equidigital number, since it uses as much as digits as its factorization.

33222181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

The square root of 33222181 is about 5763.8685793484. The cubic root of 33222181 is about 321.4716751883.

The spelling of 33222181 in words is "thirty-three million, two hundred twenty-two thousand, one hundred eighty-one".