1222216664 has 16 divisors (see below), whose sum is σ = 2365581120. Its totient is φ = 591395040.

The previous prime is 1222216657. The next prime is 1222216691. The reversal of 1222216664 is 4666122221.

It is a self number, because there is not a number n which added to its sum of digits gives 1222216664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2463899 + ... + 2464394.

It is an arithmetic number, because the mean of its divisors is an integer number (147848820).

Almost surely, 2^1222216664 is an apocalyptic number.

It is an amenable number.

1222216664 is a deficient number, since it is larger than the sum of its proper divisors (1143364456).

1222216664 is a wasteful number, since it uses less digits than its factorization.

1222216664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4928330 (or 4928326 counting only the distinct ones).

The product of its digits is 13824, while the sum is 32.

The square root of 1222216664 is about 34960.2154455604. The cubic root of 1222216664 is about 1069.1764892517.

Adding to 1222216664 its reverse (4666122221), we get a palindrome (5888338885).

The spelling of 1222216664 in words is "one billion, two hundred twenty-two million, two hundred sixteen thousand, six hundred sixty-four".