33212013 has 4 divisors (see below), whose sum is σ = 44282688. Its totient is φ = 22141340.

The previous prime is 33211993. The next prime is 33212029. The reversal of 33212013 is 31021233.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31021233 = 3 ⋅10340411.

It is a cyclic number.

It is not a de Polignac number, because 33212013 - 2⁶ = 33211949 is a prime.

It is a super-2 number, since 2×33212013² = 2206075615024338, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 33211983 and 33212001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33212093) 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, 5535333 + ... + 5535338.

It is an arithmetic number, because the mean of its divisors is an integer number (11070672).

Almost surely, 2^33212013 is an apocalyptic number.

It is an amenable number.

33212013 is a deficient number, since it is larger than the sum of its proper divisors (11070675).

33212013 is a wasteful number, since it uses less digits than its factorization.

33212013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11070674.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 33212013 is about 5762.9864653667. The cubic root of 33212013 is about 321.4388752394.

Adding to 33212013 its reverse (31021233), we get a palindrome (64233246).

The spelling of 33212013 in words is "thirty-three million, two hundred twelve thousand, thirteen".