1331994512 has 20 divisors (see below), whose sum is σ = 2581941516. Its totient is φ = 665687040.

The previous prime is 1331994509. The next prime is 1331994527. The reversal of 1331994512 is 2154991331.

It can be written as a sum of positive squares in 2 ways, for example, as 1164447376 + 167547136 = 34124^2 + 12944^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18248 + ... + 54744.

Almost surely, 2^1331994512 is an apocalyptic number.

It is a pronic number, being equal to 36496×36497.

It is an amenable number.

1331994512 is a deficient number, since it is larger than the sum of its proper divisors (1249947004).

1331994512 is a wasteful number, since it uses less digits than its factorization.

1331994512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38786 (or 38780 counting only the distinct ones).

The product of its digits is 29160, while the sum is 38.

The square root of 1331994512 is about 36496.4999965750. The cubic root of 1331994512 is about 1100.2739020402.

The spelling of 1331994512 in words is "one billion, three hundred thirty-one million, nine hundred ninety-four thousand, five hundred twelve".