221222273 has 2 divisors, whose sum is σ = 221222274. Its totient is φ = 221222272.

The previous prime is 221222269. The next prime is 221222291. The reversal of 221222273 is 372222122.

221222273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213510544 + 7711729 = 14612^2 + 2777^2 .

It is a cyclic number.

It is not a de Polignac number, because 221222273 - 2² = 221222269 is a prime.

It is not a weakly prime, because it can be changed into another prime (221222203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110611136 + 110611137.

It is an arithmetic number, because the mean of its divisors is an integer number (110611137).

Almost surely, 2^221222273 is an apocalyptic number.

It is an amenable number.

221222273 is a deficient number, since it is larger than the sum of its proper divisors (1).

221222273 is an equidigital number, since it uses as much as digits as its factorization.

221222273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 23.

The square root of 221222273 is about 14873.5427185321. The cubic root of 221222273 is about 604.7969839968.

Adding to 221222273 its reverse (372222122), we get a palindrome (593444395).

The spelling of 221222273 in words is "two hundred twenty-one million, two hundred twenty-two thousand, two hundred seventy-three".