33321013 has 4 divisors (see below), whose sum is σ = 36350208. Its totient is φ = 30291820.

The previous prime is 33321007. The next prime is 33321023. The reversal of 33321013 is 31012333.

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: 31012333 = 11 ⋅2819303.

It is a cyclic number.

It is not a de Polignac number, because 33321013 - 2⁵ = 33320981 is a prime.

It is a super-2 number, since 2×33321013² = 2220579814692338, 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 (33321023) 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, 1514581 + ... + 1514602.

It is an arithmetic number, because the mean of its divisors is an integer number (9087552).

Almost surely, 2^33321013 is an apocalyptic number.

It is an amenable number.

33321013 is a deficient number, since it is larger than the sum of its proper divisors (3029195).

33321013 is a wasteful number, since it uses less digits than its factorization.

33321013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3029194.

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

The square root of 33321013 is about 5772.4356211222. The cubic root of 33321013 is about 321.7901394790.

Adding to 33321013 its reverse (31012333), we get a palindrome (64333346).

The spelling of 33321013 in words is "thirty-three million, three hundred twenty-one thousand, thirteen".