131113233405 has 192 divisors, whose sum is σ = 299928545280. Its totient is φ = 51330931200.

The previous prime is 131113233401. The next prime is 131113233421. The reversal of 131113233405 is 504332311131.

131113233405 is a `hidden beast` number, since 1 + 3 + 11 + 13 + 233 + 405 = 666.

It is not a de Polignac number, because 131113233405 - 2² = 131113233401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131113233401) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 11910634 + ... + 11921636.

It is an arithmetic number, because the mean of its divisors is an integer number (1562127840).

Almost surely, 2^131113233405 is an apocalyptic number.

131113233405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131113233405 is an abundant number, since it is smaller than the sum of its proper divisors (168815311875).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131113233405 is a wasteful number, since it uses less digits than its factorization.

131113233405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11232 (or 11229 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

Adding to 131113233405 its reverse (504332311131), we get a palindrome (635445544536).

The spelling of 131113233405 in words is "one hundred thirty-one billion, one hundred thirteen million, two hundred thirty-three thousand, four hundred five".