1321322232 has 64 divisors (see below), whose sum is σ = 3394258560. Its totient is φ = 428400000.

The previous prime is 1321322231. The next prime is 1321322237. The reversal of 1321322232 is 2322231231.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1321322199 and 1321322208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321322231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256482 + ... + 261582.

It is an arithmetic number, because the mean of its divisors is an integer number (53035290).

Almost surely, 2^1321322232 is an apocalyptic number.

1321322232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321322232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1697129280).

1321322232 is an abundant number, since it is smaller than the sum of its proper divisors (2072936328).

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

1321322232 is a wasteful number, since it uses less digits than its factorization.

1321322232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5404 (or 5400 counting only the distinct ones).

The product of its digits is 864, while the sum is 21.

The square root of 1321322232 is about 36349.9963136174. The cubic root of 1321322232 is about 1097.3274603149.

Adding to 1321322232 its reverse (2322231231), we get a palindrome (3643553463).

The spelling of 1321322232 in words is "one billion, three hundred twenty-one million, three hundred twenty-two thousand, two hundred thirty-two".