1328131513 has 2 divisors, whose sum is σ = 1328131514. Its totient is φ = 1328131512.

The previous prime is 1328131501. The next prime is 1328131547. The reversal of 1328131513 is 3151318231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1327290624 + 840889 = 36432^2 + 917^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328131513 - 2²¹ = 1326034361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1328131313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664065756 + 664065757.

It is an arithmetic number, because the mean of its divisors is an integer number (664065757).

Almost surely, 2^1328131513 is an apocalyptic number.

It is an amenable number.

1328131513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328131513 is an equidigital number, since it uses as much as digits as its factorization.

1328131513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 1328131513 is about 36443.5387002964. The cubic root of 1328131513 is about 1099.2092148398.

Adding to 1328131513 its reverse (3151318231), we get a palindrome (4479449744).

The spelling of 1328131513 in words is "one billion, three hundred twenty-eight million, one hundred thirty-one thousand, five hundred thirteen".