221332033 has 24 divisors (see below), whose sum is σ = 250871040. Its totient is φ = 194950080.

The previous prime is 221332019. The next prime is 221332043. The reversal of 221332033 is 330233122.

It is a happy number.

It is not a de Polignac number, because 221332033 - 2¹⁷ = 221200961 is a prime.

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 221332033.

It is not an unprimeable number, because it can be changed into a prime (221332043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 434583 + ... + 435091.

It is an arithmetic number, because the mean of its divisors is an integer number (10452960).

Almost surely, 2^221332033 is an apocalyptic number.

It is an amenable number.

221332033 is a deficient number, since it is larger than the sum of its proper divisors (29539007).

221332033 is a wasteful number, since it uses less digits than its factorization.

221332033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 221332033 is about 14877.2320342193. The cubic root of 221332033 is about 604.8969913189.

Adding to 221332033 its reverse (330233122), we get a palindrome (551565155).

The spelling of 221332033 in words is "two hundred twenty-one million, three hundred thirty-two thousand, thirty-three".