16311223 has 2 divisors, whose sum is σ = 16311224. Its totient is φ = 16311222.

The previous prime is 16311173. The next prime is 16311241. The reversal of 16311223 is 32211361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16311223 - 2⁹ = 16310711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16311223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16311263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8155611 + 8155612.

It is an arithmetic number, because the mean of its divisors is an integer number (8155612).

Almost surely, 2^16311223 is an apocalyptic number.

16311223 is a deficient number, since it is larger than the sum of its proper divisors (1).

16311223 is an equidigital number, since it uses as much as digits as its factorization.

16311223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 19.

The square root of 16311223 is about 4038.7155136256. The cubic root of 16311223 is about 253.6075479896.

Adding to 16311223 its reverse (32211361), we get a palindrome (48522584).

The spelling of 16311223 in words is "sixteen million, three hundred eleven thousand, two hundred twenty-three".