33112213 has 2 divisors, whose sum is σ = 33112214. Its totient is φ = 33112212.

The previous prime is 33112201. The next prime is 33112217. The reversal of 33112213 is 31221133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23882769 + 9229444 = 4887^2 + 3038^2 .

It is a cyclic number.

It is not a de Polignac number, because 33112213 - 2⁵ = 33112181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33112217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16556106 + 16556107.

It is an arithmetic number, because the mean of its divisors is an integer number (16556107).

Almost surely, 2^33112213 is an apocalyptic number.

It is an amenable number.

33112213 is a deficient number, since it is larger than the sum of its proper divisors (1).

33112213 is an equidigital number, since it uses as much as digits as its factorization.

33112213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 16.

The square root of 33112213 is about 5754.3212458117. The cubic root of 33112213 is about 321.1165843674.

Adding to 33112213 its reverse (31221133), we get a palindrome (64333346).

It can be divided in two parts, 331 and 12213, that added together give a square (12544 = 112²).

The spelling of 33112213 in words is "thirty-three million, one hundred twelve thousand, two hundred thirteen".