1222717636 has 24 divisors (see below), whose sum is σ = 2459580480. Its totient is φ = 520990752.

The previous prime is 1222717627. The next prime is 1222717669. The reversal of 1222717636 is 6367172221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1222717595 and 1222717604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121366 + ... + 131053.

It is an arithmetic number, because the mean of its divisors is an integer number (102482520).

Almost surely, 2^1222717636 is an apocalyptic number.

It is an amenable number.

1222717636 is an abundant number, since it is smaller than the sum of its proper divisors (1236862844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222717636 is a wasteful number, since it uses less digits than its factorization.

1222717636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252603 (or 252601 counting only the distinct ones).

The product of its digits is 42336, while the sum is 37.

The square root of 1222717636 is about 34967.3795987060. The cubic root of 1222717636 is about 1069.3225501846.

Adding to 1222717636 its reverse (6367172221), we get a palindrome (7589889857).

The spelling of 1222717636 in words is "one billion, two hundred twenty-two million, seven hundred seventeen thousand, six hundred thirty-six".