221113433 has 2 divisors, whose sum is σ = 221113434. Its totient is φ = 221113432.

The previous prime is 221113397. The next prime is 221113447. The reversal of 221113433 is 334311122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202692169 + 18421264 = 14237^2 + 4292^2 .

It is a cyclic number.

It is not a de Polignac number, because 221113433 - 2²⁴ = 204336217 is a prime.

It is a super-3 number, since 3×221113433³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (221113133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110556716 + 110556717.

It is an arithmetic number, because the mean of its divisors is an integer number (110556717).

Almost surely, 2^221113433 is an apocalyptic number.

It is an amenable number.

221113433 is a deficient number, since it is larger than the sum of its proper divisors (1).

221113433 is an equidigital number, since it uses as much as digits as its factorization.

221113433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 20.

The square root of 221113433 is about 14869.8834225424. The cubic root of 221113433 is about 604.6977822585.

Adding to 221113433 its reverse (334311122), we get a palindrome (555424555).

The spelling of 221113433 in words is "two hundred twenty-one million, one hundred thirteen thousand, four hundred thirty-three".