33216223 has 4 divisors (see below), whose sum is σ = 34361640. Its totient is φ = 32070808.

The previous prime is 33216217. The next prime is 33216251. The reversal of 33216223 is 32261233.

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 33216223 - 2¹³ = 33208031 is a prime.

It is a super-2 number, since 2×33216223² = 2206634940771458, 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 = 33216194 and 33216203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33216203) 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, 572665 + ... + 572722.

It is an arithmetic number, because the mean of its divisors is an integer number (8590410).

Almost surely, 2^33216223 is an apocalyptic number.

33216223 is a deficient number, since it is larger than the sum of its proper divisors (1145417).

33216223 is a wasteful number, since it uses less digits than its factorization.

33216223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145416.

The product of its digits is 1296, while the sum is 22.

The square root of 33216223 is about 5763.3517157987. The cubic root of 33216223 is about 321.4524566754.

Adding to 33216223 its reverse (32261233), we get a palindrome (65477456).

The spelling of 33216223 in words is "thirty-three million, two hundred sixteen thousand, two hundred twenty-three".