1331030320 has 20 divisors (see below), whose sum is σ = 3094645680. Its totient is φ = 532412096.

The previous prime is 1331030297. The next prime is 1331030329. The reversal of 1331030320 is 230301331.

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

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1331030294 and 1331030303.

It is not an unprimeable number, because it can be changed into a prime (1331030329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8318860 + ... + 8319019.

It is an arithmetic number, because the mean of its divisors is an integer number (154732284).

Almost surely, 2^1331030320 is an apocalyptic number.

1331030320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331030320 is an abundant number, since it is smaller than the sum of its proper divisors (1763615360).

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

1331030320 is a wasteful number, since it uses less digits than its factorization.

1331030320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16637892 (or 16637886 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 16.

The square root of 1331030320 is about 36483.2882289960. The cubic root of 1331030320 is about 1100.0083525537.

Adding to 1331030320 its reverse (230301331), we get a palindrome (1561331651).

The spelling of 1331030320 in words is "one billion, three hundred thirty-one million, thirty thousand, three hundred twenty".