1331321512 has 32 divisors (see below), whose sum is σ = 2608577280. Its totient is φ = 635785920.

The previous prime is 1331321491. The next prime is 1331321539. The reversal of 1331321512 is 2151231331.

It is a super-2 number, since 2×1331321512² = 3544833936627932288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129937 + ... + 139807.

It is an arithmetic number, because the mean of its divisors is an integer number (81518040).

Almost surely, 2^1331321512 is an apocalyptic number.

It is an amenable number.

1331321512 is a deficient number, since it is larger than the sum of its proper divisors (1277255768).

1331321512 is a wasteful number, since it uses less digits than its factorization.

1331321512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10633 (or 10629 counting only the distinct ones).

The product of its digits is 540, while the sum is 22.

The square root of 1331321512 is about 36487.2787694561. The cubic root of 1331321512 is about 1100.0885636682.

Adding to 1331321512 its reverse (2151231331), we get a palindrome (3482552843).

The spelling of 1331321512 in words is "one billion, three hundred thirty-one million, three hundred twenty-one thousand, five hundred twelve".