221133433 has 16 divisors (see below), whose sum is σ = 239414400. Its totient is φ = 203486976.

The previous prime is 221133427. The next prime is 221133443. The reversal of 221133433 is 334331122.

It is a cyclic number.

It is not a de Polignac number, because 221133433 - 2⁹ = 221132921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221133413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169060 + ... + 170362.

It is an arithmetic number, because the mean of its divisors is an integer number (14963400).

Almost surely, 2^221133433 is an apocalyptic number.

It is an amenable number.

221133433 is a deficient number, since it is larger than the sum of its proper divisors (18280967).

221133433 is a wasteful number, since it uses less digits than its factorization.

221133433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536.

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

The square root of 221133433 is about 14870.5559075645. Note that the first 3 decimals coincide. The cubic root of 221133433 is about 604.7160136114.

Adding to 221133433 its reverse (334331122), we get a palindrome (555464555).

The spelling of 221133433 in words is "two hundred twenty-one million, one hundred thirty-three thousand, four hundred thirty-three".