1331223312 has 40 divisors (see below), whose sum is σ = 3482535040. Its totient is φ = 438122880.

The previous prime is 1331223293. The next prime is 1331223317. The reversal of 1331223312 is 2133221331.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1331223317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171739 + ... + 179322.

It is an arithmetic number, because the mean of its divisors is an integer number (87063376).

Almost surely, 2^1331223312 is an apocalyptic number.

1331223312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1331223312 is an abundant number, since it is smaller than the sum of its proper divisors (2151311728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1331223312 is a wasteful number, since it uses less digits than its factorization.

1331223312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351151 (or 351145 counting only the distinct ones).

The product of its digits is 648, while the sum is 21.

The square root of 1331223312 is about 36485.9330701573. The cubic root of 1331223312 is about 1100.0615150171.

Adding to 1331223312 its reverse (2133221331), we get a palindrome (3464444643).

The spelling of 1331223312 in words is "one billion, three hundred thirty-one million, two hundred twenty-three thousand, three hundred twelve".