1328131516 has 12 divisors (see below), whose sum is σ = 2324692720. Its totient is φ = 663933600.

The previous prime is 1328131513. The next prime is 1328131547. The reversal of 1328131516 is 6151318231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328131513) 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, 8385 + ... + 52216.

Almost surely, 2^1328131516 is an apocalyptic number.

It is an amenable number.

1328131516 is a deficient number, since it is larger than the sum of its proper divisors (996561204).

1328131516 is a wasteful number, since it uses less digits than its factorization.

1328131516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66084 (or 66082 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 1328131516 is about 36443.5387414559. The cubic root of 1328131516 is about 1099.2092156675.

Adding to 1328131516 its reverse (6151318231), we get a palindrome (7479449747).

The spelling of 1328131516 in words is "one billion, three hundred twenty-eight million, one hundred thirty-one thousand, five hundred sixteen".