33203213 has 2 divisors, whose sum is σ = 33203214. Its totient is φ = 33203212.

The previous prime is 33203207. The next prime is 33203243. The reversal of 33203213 is 31230233.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16662724 + 16540489 = 4082^2 + 4067^2 .

It is a cyclic number.

It is not a de Polignac number, because 33203213 - 2⁸ = 33202957 is a prime.

It is a super-2 number, since 2×33203213² = 2204906707046738, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 33203191 and 33203200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33203243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16601606 + 16601607.

It is an arithmetic number, because the mean of its divisors is an integer number (16601607).

Almost surely, 2^33203213 is an apocalyptic number.

It is an amenable number.

33203213 is a deficient number, since it is larger than the sum of its proper divisors (1).

33203213 is an equidigital number, since it uses as much as digits as its factorization.

33203213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 17.

The square root of 33203213 is about 5762.2229217551. Note that the first 3 decimals coincide. The cubic root of 33203213 is about 321.4104827822.

Adding to 33203213 its reverse (31230233), we get a palindrome (64433446).

The spelling of 33203213 in words is "thirty-three million, two hundred three thousand, two hundred thirteen".