1222511552 has 28 divisors (see below), whose sum is σ = 2427290040. Its totient is φ = 610910976.

The previous prime is 1222511551. The next prime is 1222511557. The reversal of 1222511552 is 2551152221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222511551) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 138899 + ... + 147437.

It is an arithmetic number, because the mean of its divisors is an integer number (86688930).

Almost surely, 2^1222511552 is an apocalyptic number.

It is an amenable number.

1222511552 is a deficient number, since it is larger than the sum of its proper divisors (1204778488).

1222511552 is an equidigital number, since it uses as much as digits as its factorization.

1222511552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10788 (or 10778 counting only the distinct ones).

The product of its digits is 2000, while the sum is 26.

The square root of 1222511552 is about 34964.4326709300. The cubic root of 1222511552 is about 1069.2624701782.

Adding to 1222511552 its reverse (2551152221), we get a palindrome (3773663773).

The spelling of 1222511552 in words is "one billion, two hundred twenty-two million, five hundred eleven thousand, five hundred fifty-two".