1331304402320 has 80 divisors (see below), whose sum is σ = 3145057953408. Its totient is φ = 523976386560.

The previous prime is 1331304402301. The next prime is 1331304402349. The reversal of 1331304402320 is 232044031331.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1331304402320² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1331304402320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4581197 + ... + 4863123.

Almost surely, 2^{1331304402320} is an apocalyptic number.

1331304402320 is a gapful number since it is divisible by the number (10) 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 1331304402320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1572528976704).

1331304402320 is an abundant number, since it is smaller than the sum of its proper divisors (1813753551088).

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

1331304402320 is a wasteful number, since it uses less digits than its factorization.

1331304402320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282888 (or 282882 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 1331304402320 its reverse (232044031331), we get a palindrome (1563348433651).

The spelling of 1331304402320 in words is "one trillion, three hundred thirty-one billion, three hundred four million, four hundred two thousand, three hundred twenty".