33164221 has 2 divisors, whose sum is σ = 33164222. Its totient is φ = 33164220.

The previous prime is 33164147. The next prime is 33164233. The reversal of 33164221 is 12246133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30140100 + 3024121 = 5490^2 + 1739^2 .

It is a cyclic number.

It is not a de Polignac number, because 33164221 - 2⁹ = 33163709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 33164192 and 33164201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33164921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16582110 + 16582111.

It is an arithmetic number, because the mean of its divisors is an integer number (16582111).

Almost surely, 2^33164221 is an apocalyptic number.

It is an amenable number.

33164221 is a deficient number, since it is larger than the sum of its proper divisors (1).

33164221 is an equidigital number, since it uses as much as digits as its factorization.

33164221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 33164221 is about 5758.8385113667. The cubic root of 33164221 is about 321.2846179897.

The spelling of 33164221 in words is "thirty-three million, one hundred sixty-four thousand, two hundred twenty-one".