1331022320 has 20 divisors (see below), whose sum is σ = 3094627080. Its totient is φ = 532408896.

The previous prime is 1331022317. The next prime is 1331022331. The reversal of 1331022320 is 232201331.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8318810 + ... + 8318969.

It is an arithmetic number, because the mean of its divisors is an integer number (154731354).

Almost surely, 2^1331022320 is an apocalyptic number.

1331022320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331022320 is an abundant number, since it is smaller than the sum of its proper divisors (1763604760).

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

1331022320 is a wasteful number, since it uses less digits than its factorization.

1331022320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16637792 (or 16637786 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1331022320 is about 36483.1785895911. The cubic root of 1331022320 is about 1100.0061487260.

Adding to 1331022320 its reverse (232201331), we get a palindrome (1563223651).

The spelling of 1331022320 in words is "one billion, three hundred thirty-one million, twenty-two thousand, three hundred twenty".