221226263 has 2 divisors, whose sum is σ = 221226264. Its totient is φ = 221226262.

The previous prime is 221226241. The next prime is 221226289. The reversal of 221226263 is 362622122.

It is an a-pointer prime, because the next prime (221226289) can be obtained adding 221226263 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221226263 - 2¹² = 221222167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221226233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110613131 + 110613132.

It is an arithmetic number, because the mean of its divisors is an integer number (110613132).

Almost surely, 2^221226263 is an apocalyptic number.

221226263 is a deficient number, since it is larger than the sum of its proper divisors (1).

221226263 is an equidigital number, since it uses as much as digits as its factorization.

221226263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 26.

The square root of 221226263 is about 14873.6768487150. The cubic root of 221226263 is about 604.8006200463.

Adding to 221226263 its reverse (362622122), we get a palindrome (583848385).

The spelling of 221226263 in words is "two hundred twenty-one million, two hundred twenty-six thousand, two hundred sixty-three".