221219233 has 2 divisors, whose sum is σ = 221219234. Its totient is φ = 221219232.

The previous prime is 221219171. The next prime is 221219237. The reversal of 221219233 is 332912122.

221219233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221176384 + 42849 = 14872^2 + 207^2 .

It is a cyclic number.

It is not a de Polignac number, because 221219233 - 2²⁵ = 187664801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221219198 and 221219207.

It is not a weakly prime, because it can be changed into another prime (221219237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110609616 + 110609617.

It is an arithmetic number, because the mean of its divisors is an integer number (110609617).

Almost surely, 2^221219233 is an apocalyptic number.

It is an amenable number.

221219233 is a deficient number, since it is larger than the sum of its proper divisors (1).

221219233 is an equidigital number, since it uses as much as digits as its factorization.

221219233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 221219233 is about 14873.4405232952. The cubic root of 221219233 is about 604.7942136439.

The spelling of 221219233 in words is "two hundred twenty-one million, two hundred nineteen thousand, two hundred thirty-three".