1513305023 has 4 divisors (see below), whose sum is σ = 1515798720. Its totient is φ = 1510811328.

The previous prime is 1513305007. The next prime is 1513305029. The reversal of 1513305023 is 3205033151.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1513305023 - 2⁴ = 1513305007 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 1513305023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1513305029) 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 3 ways as a sum of consecutive naturals, for example, 1245938 + ... + 1247151.

It is an arithmetic number, because the mean of its divisors is an integer number (378949680).

Almost surely, 2^1513305023 is an apocalyptic number.

1513305023 is a deficient number, since it is larger than the sum of its proper divisors (2493697).

1513305023 is an equidigital number, since it uses as much as digits as its factorization.

1513305023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2493696.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 1513305023 is about 38901.2213561477. The cubic root of 1513305023 is about 1148.0888288839.

Adding to 1513305023 its reverse (3205033151), we get a palindrome (4718338174).

The spelling of 1513305023 in words is "one billion, five hundred thirteen million, three hundred five thousand, twenty-three".