1331519816 has 48 divisors (see below), whose sum is σ = 2766059520. Its totient is φ = 600415200.

The previous prime is 1331519789. The next prime is 1331519837. The reversal of 1331519816 is 6189151331.

It is a self number, because there is not a number n which added to its sum of digits gives 1331519816.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117521 + ... + 128351.

It is an arithmetic number, because the mean of its divisors is an integer number (57626240).

Almost surely, 2^1331519816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1331519816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1383029760).

1331519816 is an abundant number, since it is smaller than the sum of its proper divisors (1434539704).

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

1331519816 is a wasteful number, since it uses less digits than its factorization.

1331519816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10986 (or 10971 counting only the distinct ones).

The product of its digits is 19440, while the sum is 38.

The square root of 1331519816 is about 36489.9961085227. The cubic root of 1331519816 is about 1100.1431813620.

The spelling of 1331519816 in words is "one billion, three hundred thirty-one million, five hundred nineteen thousand, eight hundred sixteen".