1222252165 has 16 divisors (see below), whose sum is σ = 1475776512. Its totient is φ = 971771904.

The previous prime is 1222252153. The next prime is 1222252231. The reversal of 1222252165 is 5612522221.

It is a cyclic number.

It is not a de Polignac number, because 1222252165 - 2¹⁷ = 1222121093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 779212 + ... + 780778.

It is an arithmetic number, because the mean of its divisors is an integer number (92236032).

Almost surely, 2^1222252165 is an apocalyptic number.

It is an amenable number.

1222252165 is a deficient number, since it is larger than the sum of its proper divisors (253524347).

1222252165 is a wasteful number, since it uses less digits than its factorization.

1222252165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436.

The product of its digits is 4800, while the sum is 28.

The square root of 1222252165 is about 34960.7231761587. The cubic root of 1222252165 is about 1069.1868410626.

Adding to 1222252165 its reverse (5612522221), we get a palindrome (6834774386).

The spelling of 1222252165 in words is "one billion, two hundred twenty-two million, two hundred fifty-two thousand, one hundred sixty-five".