1328131515 has 16 divisors (see below), whose sum is σ = 2125610496. Its totient is φ = 708136800.

The previous prime is 1328131513. The next prime is 1328131547. The reversal of 1328131515 is 5151318231.

It is not a de Polignac number, because 1328131515 - 2¹ = 1328131513 is a prime.

It is a super-2 number, since 2×1328131515² = 3527866642272390450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1328131513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53700 + ... + 74430.

It is an arithmetic number, because the mean of its divisors is an integer number (132850656).

Almost surely, 2^1328131515 is an apocalyptic number.

1328131515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1328131515 is a deficient number, since it is larger than the sum of its proper divisors (797478981).

1328131515 is a wasteful number, since it uses less digits than its factorization.

1328131515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25010.

The product of its digits is 3600, while the sum is 30.

The square root of 1328131515 is about 36443.5387277361. The cubic root of 1328131515 is about 1099.2092153916.

Adding to 1328131515 its reverse (5151318231), we get a palindrome (6479449746).

The spelling of 1328131515 in words is "one billion, three hundred twenty-eight million, one hundred thirty-one thousand, five hundred fifteen".