1331013513 has 4 divisors (see below), whose sum is σ = 1774684688. Its totient is φ = 887342340.

The previous prime is 1331013503. The next prime is 1331013527. The reversal of 1331013513 is 3153101331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3153101331 = 3 ⋅1051033777.

It is not a de Polignac number, because 1331013513 - 2⁶ = 1331013449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1331013513.

It is not an unprimeable number, because it can be changed into a prime (1331013503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221835583 + ... + 221835588.

It is an arithmetic number, because the mean of its divisors is an integer number (443671172).

Almost surely, 2^1331013513 is an apocalyptic number.

It is an amenable number.

1331013513 is a deficient number, since it is larger than the sum of its proper divisors (443671175).

1331013513 is an equidigital number, since it uses as much as digits as its factorization.

1331013513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443671174.

The product of its (nonzero) digits is 405, while the sum is 21.

The square root of 1331013513 is about 36483.0578899302. The cubic root of 1331013513 is about 1100.0037225769.

Adding to 1331013513 its reverse (3153101331), we get a palindrome (4484114844).

The spelling of 1331013513 in words is "one billion, three hundred thirty-one million, thirteen thousand, five hundred thirteen".