221233163 has 2 divisors, whose sum is σ = 221233164. Its totient is φ = 221233162.

The previous prime is 221233139. The next prime is 221233241. The reversal of 221233163 is 361332122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221233163 - 2¹⁸ = 220971019 is a prime.

It is a super-2 number, since 2×221233163² = 97888224821969138, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221233063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110616581 + 110616582.

It is an arithmetic number, because the mean of its divisors is an integer number (110616582).

Almost surely, 2^221233163 is an apocalyptic number.

221233163 is a deficient number, since it is larger than the sum of its proper divisors (1).

221233163 is an equidigital number, since it uses as much as digits as its factorization.

221233163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 23.

The square root of 221233163 is about 14873.9088003120. The cubic root of 221233163 is about 604.8069078485.

Adding to 221233163 its reverse (361332122), we get a palindrome (582565285).

The spelling of 221233163 in words is "two hundred twenty-one million, two hundred thirty-three thousand, one hundred sixty-three".