1515011313 has 4 divisors (see below), whose sum is σ = 2020015088. Its totient is φ = 1010007540.

The previous prime is 1515011297. The next prime is 1515011317. The reversal of 1515011313 is 3131105151.

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: 3131105151 = 3 ⋅1043701717.

It is not a de Polignac number, because 1515011313 - 2⁴ = 1515011297 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 1515011313.

It is not an unprimeable number, because it can be changed into a prime (1515011317) 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, 252501883 + ... + 252501888.

It is an arithmetic number, because the mean of its divisors is an integer number (505003772).

Almost surely, 2^1515011313 is an apocalyptic number.

It is an amenable number.

1515011313 is a deficient number, since it is larger than the sum of its proper divisors (505003775).

1515011313 is an equidigital number, since it uses as much as digits as its factorization.

1515011313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505003774.

The product of its (nonzero) digits is 225, while the sum is 21.

The square root of 1515011313 is about 38923.1462371684. The cubic root of 1515011313 is about 1148.5201666193.

Adding to 1515011313 its reverse (3131105151), we get a palindrome (4646116464).

The spelling of 1515011313 in words is "one billion, five hundred fifteen million, eleven thousand, three hundred thirteen".