33100213 has 4 divisors (see below), whose sum is σ = 33242508. Its totient is φ = 32957920.

The previous prime is 33100187. The next prime is 33100253. The reversal of 33100213 is 31200133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31200133 = 4663 ⋅6691.

It can be written as a sum of positive squares in 2 ways, for example, as 15944049 + 17156164 = 3993^2 + 4142^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33100213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33100193 and 33100202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33100253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70798 + ... + 71263.

It is an arithmetic number, because the mean of its divisors is an integer number (8310627).

Almost surely, 2^33100213 is an apocalyptic number.

It is an amenable number.

33100213 is a deficient number, since it is larger than the sum of its proper divisors (142295).

33100213 is a wasteful number, since it uses less digits than its factorization.

33100213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142294.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 33100213 is about 5753.2784566715. The cubic root of 33100213 is about 321.0777883638.

Adding to 33100213 its reverse (31200133), we get a palindrome (64300346).

The spelling of 33100213 in words is "thirty-three million, one hundred thousand, two hundred thirteen".