1223516312 has 16 divisors (see below), whose sum is σ = 2310840360. Its totient is φ = 607292224.

The previous prime is 1223516309. The next prime is 1223516353. The reversal of 1223516312 is 2136153221.

It is a happy 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 3 ways as a sum of consecutive naturals, for example, 557078 + ... + 559269.

Almost surely, 2^1223516312 is an apocalyptic number.

It is an amenable number.

1223516312 is a deficient number, since it is larger than the sum of its proper divisors (1087324048).

1223516312 is a wasteful number, since it uses less digits than its factorization.

1223516312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116490 (or 1116486 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 1223516312 is about 34978.7980353814. The cubic root of 1223516312 is about 1069.5553257513. Note that the first 3 decimals are identical.

Adding to 1223516312 its reverse (2136153221), we get a palindrome (3359669533).

The spelling of 1223516312 in words is "one billion, two hundred twenty-three million, five hundred sixteen thousand, three hundred twelve".