221034223 has 2 divisors, whose sum is σ = 221034224. Its totient is φ = 221034222.

The previous prime is 221034211. The next prime is 221034257. The reversal of 221034223 is 322430122.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221034223 is a prime.

It is a super-2 number, since 2×221034223² = 97712255474427458, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221034223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221034283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110517111 + 110517112.

It is an arithmetic number, because the mean of its divisors is an integer number (110517112).

Almost surely, 2^221034223 is an apocalyptic number.

221034223 is a deficient number, since it is larger than the sum of its proper divisors (1).

221034223 is an equidigital number, since it uses as much as digits as its factorization.

221034223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 221034223 is about 14867.2197468121. The cubic root of 221034223 is about 604.6255661847.

Adding to 221034223 its reverse (322430122), we get a palindrome (543464345).

The spelling of 221034223 in words is "two hundred twenty-one million, thirty-four thousand, two hundred twenty-three".