13200235551531 has 24 divisors (see below), whose sum is σ = 21888581944320. Its totient is φ = 7509166660656.

The previous prime is 13200235551497. The next prime is 13200235551533. The reversal of 13200235551531 is 13515553200231.

13200235551531 is a `hidden beast` number, since 1 + 3 + 2 + 0 + 0 + 23 + 55 + 51 + 531 = 666.

13200235551531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13200235551531 - 2⁷ = 13200235551403 is a prime.

It is a super-2 number, since 2×13200235551531² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13200235551533) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 469778661 + ... + 469806758.

It is an arithmetic number, because the mean of its divisors is an integer number (912024247680).

Almost surely, 2^{13200235551531} is an apocalyptic number.

13200235551531 is a deficient number, since it is larger than the sum of its proper divisors (8688346392789).

13200235551531 is a wasteful number, since it uses less digits than its factorization.

13200235551531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939585655 (or 939585652 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

Adding to 13200235551531 its reverse (13515553200231), we get a palindrome (26715788751762).

The spelling of 13200235551531 in words is "thirteen trillion, two hundred billion, two hundred thirty-five million, five hundred fifty-one thousand, five hundred thirty-one".