33398213 has 4 divisors (see below), whose sum is σ = 33474048. Its totient is φ = 33322380.

The previous prime is 33398203. The next prime is 33398221. The reversal of 33398213 is 31289333.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 33398213 - 2⁸ = 33397957 is a prime.

It is a super-2 number, since 2×33398213² = 2230881263186738, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33398213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33398203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37253 + ... + 38138.

It is an arithmetic number, because the mean of its divisors is an integer number (8368512).

Almost surely, 2^33398213 is an apocalyptic number.

It is an amenable number.

33398213 is a deficient number, since it is larger than the sum of its proper divisors (75835).

33398213 is an equidigital number, since it uses as much as digits as its factorization.

33398213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75834.

The product of its digits is 11664, while the sum is 32.

The square root of 33398213 is about 5779.1187044393. The cubic root of 33398213 is about 322.0384616429.

The spelling of 33398213 in words is "thirty-three million, three hundred ninety-eight thousand, two hundred thirteen".