33001213 has 4 divisors (see below), whose sum is σ = 37715680. Its totient is φ = 28286748.

The previous prime is 33001211. The next prime is 33001219. The reversal of 33001213 is 31210033.

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 not a de Polignac number, because 33001213 - 2¹ = 33001211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33001193 and 33001202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33001211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2357223 + ... + 2357236.

It is an arithmetic number, because the mean of its divisors is an integer number (9428920).

Almost surely, 2^33001213 is an apocalyptic number.

It is an amenable number.

33001213 is a deficient number, since it is larger than the sum of its proper divisors (4714467).

33001213 is an equidigital number, since it uses as much as digits as its factorization.

33001213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4714466.

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

The square root of 33001213 is about 5744.6682236662. The cubic root of 33001213 is about 320.7573629910.

Adding to 33001213 its reverse (31210033), we get a palindrome (64211246).

The spelling of 33001213 in words is "thirty-three million, one thousand, two hundred thirteen".