33490213 has 2 divisors, whose sum is σ = 33490214. Its totient is φ = 33490212.

The previous prime is 33490211. The next prime is 33490241. The reversal of 33490213 is 31209433.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28323684 + 5166529 = 5322^2 + 2273^2 .

It is a cyclic number.

It is not a de Polignac number, because 33490213 - 2¹ = 33490211 is a prime.

It is a super-2 number, since 2×33490213² = 2243188733570738, which contains 22 as substring.

Together with 33490211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33490211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16745106 + 16745107.

It is an arithmetic number, because the mean of its divisors is an integer number (16745107).

Almost surely, 2^33490213 is an apocalyptic number.

It is an amenable number.

33490213 is a deficient number, since it is larger than the sum of its proper divisors (1).

33490213 is an equidigital number, since it uses as much as digits as its factorization.

33490213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 33490213 is about 5787.0729216073. The cubic root of 33490213 is about 322.3338903798. Note that the first 3 decimals are identical.

Adding to 33490213 its reverse (31209433), we get a palindrome (64699646).

The spelling of 33490213 in words is "thirty-three million, four hundred ninety thousand, two hundred thirteen".