221263223 has 2 divisors, whose sum is σ = 221263224. Its totient is φ = 221263222.

The previous prime is 221263139. The next prime is 221263241. The reversal of 221263223 is 322362122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221263223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221263253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110631611 + 110631612.

It is an arithmetic number, because the mean of its divisors is an integer number (110631612).

Almost surely, 2^221263223 is an apocalyptic number.

221263223 is a deficient number, since it is larger than the sum of its proper divisors (1).

221263223 is an equidigital number, since it uses as much as digits as its factorization.

221263223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 23.

The square root of 221263223 is about 14874.9192602851. The cubic root of 221263223 is about 604.8342992697.

The spelling of 221263223 in words is "two hundred twenty-one million, two hundred sixty-three thousand, two hundred twenty-three".