33421243 has 4 divisors (see below), whose sum is σ = 33441328. Its totient is φ = 33401160.

The previous prime is 33421237. The next prime is 33421259. The reversal of 33421243 is 34212433.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 33421243 - 2¹⁷ = 33290171 is a prime.

It is a super-2 number, since 2×33421243² = 2233958967330098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33421943) 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, 7296 + ... + 10957.

It is an arithmetic number, because the mean of its divisors is an integer number (8360332).

Almost surely, 2^33421243 is an apocalyptic number.

33421243 is a deficient number, since it is larger than the sum of its proper divisors (20085).

33421243 is a wasteful number, since it uses less digits than its factorization.

33421243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20084.

The product of its digits is 1728, while the sum is 22.

The square root of 33421243 is about 5781.1108794072. The cubic root of 33421243 is about 322.1124660186.

Adding to 33421243 its reverse (34212433), we get a palindrome (67633676).

The spelling of 33421243 in words is "thirty-three million, four hundred twenty-one thousand, two hundred forty-three".