33342181 has 2 divisors, whose sum is σ = 33342182. Its totient is φ = 33342180.

The previous prime is 33342167. The next prime is 33342193. The reversal of 33342181 is 18124333.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31741956 + 1600225 = 5634^2 + 1265^2 .

It is a cyclic number.

It is not a de Polignac number, because 33342181 - 2¹⁹ = 32817893 is a prime.

It is a super-2 number, since 2×33342181² = 2223402067673522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33342121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16671090 + 16671091.

It is an arithmetic number, because the mean of its divisors is an integer number (16671091).

Almost surely, 2^33342181 is an apocalyptic number.

It is an amenable number.

33342181 is a deficient number, since it is larger than the sum of its proper divisors (1).

33342181 is an equidigital number, since it uses as much as digits as its factorization.

33342181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 25.

The square root of 33342181 is about 5774.2688714676. The cubic root of 33342181 is about 321.8582667771.

The spelling of 33342181 in words is "thirty-three million, three hundred forty-two thousand, one hundred eighty-one".