33231109 has 2 divisors, whose sum is σ = 33231110. Its totient is φ = 33231108.

The previous prime is 33231089. The next prime is 33231137. The reversal of 33231109 is 90113233.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31114084 + 2117025 = 5578^2 + 1455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33231109 is a prime.

It is a super-2 number, since 2×33231109² = 2208613210739762, 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 33231109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33231139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16615554 + 16615555.

It is an arithmetic number, because the mean of its divisors is an integer number (16615555).

Almost surely, 2^33231109 is an apocalyptic number.

It is an amenable number.

33231109 is a deficient number, since it is larger than the sum of its proper divisors (1).

33231109 is an equidigital number, since it uses as much as digits as its factorization.

33231109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 33231109 is about 5764.6430071601. The cubic root of 33231109 is about 321.5004696260.

The spelling of 33231109 in words is "thirty-three million, two hundred thirty-one thousand, one hundred nine".