1222022656 has 20 divisors (see below), whose sum is σ = 2441659572. Its totient is φ = 611011072.

The previous prime is 1222022651. The next prime is 1222022687. The reversal of 1222022656 is 6562202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222022651) by changing a digit.

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 as a sum of consecutive naturals, namely, 1192870 + ... + 1193893.

Almost surely, 2^1222022656 is an apocalyptic number.

1222022656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1222022656 is a deficient number, since it is larger than the sum of its proper divisors (1219636916).

1222022656 is an frugal number, since it uses more digits than its factorization.

1222022656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386781 (or 2386765 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1222022656 is about 34957.4406385822. The cubic root of 1222022656 is about 1069.1199145121.

Adding to 1222022656 its reverse (6562202221), we get a palindrome (7784224877).

The spelling of 1222022656 in words is "one billion, two hundred twenty-two million, twenty-two thousand, six hundred fifty-six".