33213013 has 4 divisors (see below), whose sum is σ = 34110700. Its totient is φ = 32315328.

The previous prime is 33212999. The next prime is 33213017. The reversal of 33213013 is 31031233.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31382404 + 1830609 = 5602^2 + 1353^2 .

It is a cyclic number.

It is not a de Polignac number, because 33213013 - 2⁵ = 33212981 is a prime.

It is a super-2 number, since 2×33213013² = 2206208465076338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33213017) 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, 448788 + ... + 448861.

It is an arithmetic number, because the mean of its divisors is an integer number (8527675).

Almost surely, 2^33213013 is an apocalyptic number.

It is an amenable number.

33213013 is a deficient number, since it is larger than the sum of its proper divisors (897687).

33213013 is an equidigital number, since it uses as much as digits as its factorization.

33213013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897686.

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 33213013 is about 5763.0732252853. The cubic root of 33213013 is about 321.4421013376.

Adding to 33213013 its reverse (31031233), we get a palindrome (64244246).

The spelling of 33213013 in words is "thirty-three million, two hundred thirteen thousand, thirteen".