1311323222 has 48 divisors (see below), whose sum is σ = 2213160432. Its totient is φ = 582120000.

The previous prime is 1311323207. The next prime is 1311323239. The reversal of 1311323222 is 2223231131.

It is a super-2 number, since 2×1311323222² = 3439137185112922568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1311323194 and 1311323203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3114572 + ... + 3114992.

It is an arithmetic number, because the mean of its divisors is an integer number (46107509).

Almost surely, 2^1311323222 is an apocalyptic number.

1311323222 is a deficient number, since it is larger than the sum of its proper divisors (901837210).

1311323222 is a wasteful number, since it uses less digits than its factorization.

1311323222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 706 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 1311323222 is about 36212.1971440563. The cubic root of 1311323222 is about 1094.5524666986.

Adding to 1311323222 its reverse (2223231131), we get a palindrome (3534554353).

The spelling of 1311323222 in words is "one billion, three hundred eleven million, three hundred twenty-three thousand, two hundred twenty-two".