13515045423 has 16 divisors (see below), whose sum is σ = 19662223872. Its totient is φ = 8189280000.

The previous prime is 13515045391. The next prime is 13515045437. The reversal of 13515045423 is 32454051531.

It is not a de Polignac number, because 13515045423 - 2⁵ = 13515045391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13515045493) 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, 135498 + ... + 213048.

It is an arithmetic number, because the mean of its divisors is an integer number (1228888992).

Almost surely, 2^13515045423 is an apocalyptic number.

13515045423 is a deficient number, since it is larger than the sum of its proper divisors (6147178449).

13515045423 is a wasteful number, since it uses less digits than its factorization.

13515045423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82846.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 13515045423 its reverse (32454051531), we get a palindrome (45969096954).

The spelling of 13515045423 in words is "thirteen billion, five hundred fifteen million, forty-five thousand, four hundred twenty-three".