33442321 has 12 divisors (see below), whose sum is σ = 37265040. Its totient is φ = 29755160.

The previous prime is 33442309. The next prime is 33442351. The reversal of 33442321 is 12324433.

It is a happy number.

It is not a de Polignac number, because 33442321 - 2⁷ = 33442193 is a prime.

It is a super-2 number, since 2×33442321² = 2236777667734082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33442292 and 33442301.

It is not an unprimeable number, because it can be changed into a prime (33442301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147210 + ... + 147436.

It is an arithmetic number, because the mean of its divisors is an integer number (3105420).

Almost surely, 2^33442321 is an apocalyptic number.

It is an amenable number.

33442321 is a deficient number, since it is larger than the sum of its proper divisors (3822719).

33442321 is an equidigital number, since it uses as much as digits as its factorization.

33442321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524 (or 297 counting only the distinct ones).

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

The square root of 33442321 is about 5782.9335980971. The cubic root of 33442321 is about 322.1801680660.

Adding to 33442321 its reverse (12324433), we get a palindrome (45766754).

It can be divided in two parts, 3344 and 2321, that added together give a palindrome (5665).

The spelling of 33442321 in words is "thirty-three million, four hundred forty-two thousand, three hundred twenty-one".