13145023632531 has 24 divisors (see below), whose sum is σ = 20389618364160. Its totient is φ = 7510919491152.

The previous prime is 13145023632527. The next prime is 13145023632553. The reversal of 13145023632531 is 13523632054131.

It is not a de Polignac number, because 13145023632531 - 2² = 13145023632527 is a prime.

It is a super-2 number, since 2×13145023632531² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13145023632531.

It is not an unprimeable number, because it can be changed into a prime (13145023612531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 985591 + ... + 5221248.

It is an arithmetic number, because the mean of its divisors is an integer number (849567431840).

Almost surely, 2^{13145023632531} is an apocalyptic number.

13145023632531 is a deficient number, since it is larger than the sum of its proper divisors (7244594731629).

13145023632531 is a wasteful number, since it uses less digits than its factorization.

13145023632531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6221263 (or 6221256 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 39.

Adding to 13145023632531 its reverse (13523632054131), we get a palindrome (26668655686662).

The spelling of 13145023632531 in words is "thirteen trillion, one hundred forty-five billion, twenty-three million, six hundred thirty-two thousand, five hundred thirty-one".