12533235131 has 4 divisors (see below), whose sum is σ = 12738698064. Its totient is φ = 12327772200.

The previous prime is 12533235097. The next prime is 12533235161. The reversal of 12533235131 is 13153233521.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12533235131 is a prime.

It is a super-2 number, since 2×12533235131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12533235094 and 12533235103.

It is not an unprimeable number, because it can be changed into a prime (12533235161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102731375 + ... + 102731496.

It is an arithmetic number, because the mean of its divisors is an integer number (3184674516).

Almost surely, 2^12533235131 is an apocalyptic number.

12533235131 is a deficient number, since it is larger than the sum of its proper divisors (205462933).

12533235131 is an equidigital number, since it uses as much as digits as its factorization.

12533235131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205462932.

The product of its digits is 8100, while the sum is 29.

Adding to 12533235131 its reverse (13153233521), we get a palindrome (25686468652).

The spelling of 12533235131 in words is "twelve billion, five hundred thirty-three million, two hundred thirty-five thousand, one hundred thirty-one".