33402213 has 20 divisors (see below), whose sum is σ = 53737068. Its totient is φ = 20554560.

The previous prime is 33402211. The next prime is 33402251. The reversal of 33402213 is 31220433.

It can be written as a sum of positive squares in 2 ways, for example, as 2566404 + 30835809 = 1602^2 + 5553^2 .

It is not a de Polignac number, because 33402213 - 2¹ = 33402211 is a prime.

It is a super-2 number, since 2×33402213² = 2231415666594738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33402211) 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 19 ways as a sum of consecutive naturals, for example, 14808 + ... + 16913.

Almost surely, 2^33402213 is an apocalyptic number.

It is an amenable number.

33402213 is a deficient number, since it is larger than the sum of its proper divisors (20334855).

33402213 is a wasteful number, since it uses less digits than its factorization.

33402213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31746 (or 31737 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 33402213 is about 5779.4647676061. The cubic root of 33402213 is about 322.0513176443.

Adding to 33402213 its reverse (31220433), we get a palindrome (64622646).

The spelling of 33402213 in words is "thirty-three million, four hundred two thousand, two hundred thirteen".