1216650223 has 2 divisors, whose sum is σ = 1216650224. Its totient is φ = 1216650222.

The previous prime is 1216650187. The next prime is 1216650301. The reversal of 1216650223 is 3220566121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1216650223 - 2²¹ = 1214553071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1216650191 and 1216650200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216650023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608325111 + 608325112.

It is an arithmetic number, because the mean of its divisors is an integer number (608325112).

Almost surely, 2^1216650223 is an apocalyptic number.

1216650223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216650223 is an equidigital number, since it uses as much as digits as its factorization.

1216650223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1216650223 is about 34880.5135139952. The cubic root of 1216650223 is about 1067.5508729711.

The spelling of 1216650223 in words is "one billion, two hundred sixteen million, six hundred fifty thousand, two hundred twenty-three".