33013421 has 4 divisors (see below), whose sum is σ = 37729632. Its totient is φ = 28297212.

The previous prime is 33013403. The next prime is 33013433. The reversal of 33013421 is 12431033.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33013421 is a prime.

It is a super-2 number, since 2×33013421² = 2179771932246482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33013421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33013021) 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, 2358095 + ... + 2358108.

It is an arithmetic number, because the mean of its divisors is an integer number (9432408).

Almost surely, 2^33013421 is an apocalyptic number.

It is an amenable number.

33013421 is a deficient number, since it is larger than the sum of its proper divisors (4716211).

33013421 is an equidigital number, since it uses as much as digits as its factorization.

33013421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4716210.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 33013421 is about 5745.7306759019. The cubic root of 33013421 is about 320.7969102558.

Adding to 33013421 its reverse (12431033), we get a palindrome (45444454).

The spelling of 33013421 in words is "thirty-three million, thirteen thousand, four hundred twenty-one".