33222621 has 8 divisors (see below), whose sum is σ = 46628320. Its totient is φ = 20982672.

The previous prime is 33222601. The next prime is 33222643. The reversal of 33222621 is 12622233.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 33222621 - 2¹⁴ = 33206237 is a prime.

It is a super-2 number, since 2×33222621² = 2207485092219282, 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 (33222601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291370 + ... + 291483.

It is an arithmetic number, because the mean of its divisors is an integer number (5828540).

Almost surely, 2^33222621 is an apocalyptic number.

It is an amenable number.

33222621 is a deficient number, since it is larger than the sum of its proper divisors (13405699).

33222621 is a wasteful number, since it uses less digits than its factorization.

33222621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582875.

The product of its digits is 864, while the sum is 21.

The square root of 33222621 is about 5763.9067480312. The cubic root of 33222621 is about 321.4730943899.

Adding to 33222621 its reverse (12622233), we get a palindrome (45844854).

The spelling of 33222621 in words is "thirty-three million, two hundred twenty-two thousand, six hundred twenty-one".