131343263999 has 4 divisors (see below), whose sum is σ = 131344083864. Its totient is φ = 131342444136.

The previous prime is 131343263969. The next prime is 131343264007. The reversal of 131343263999 is 999362343131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 999362343131 = 383 ⋅2609301157.

It is a cyclic number.

It is not a de Polignac number, because 131343263999 - 2¹⁶ = 131343198463 is a prime.

It is a super-2 number, since 2×131343263999² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131343263999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131343263969) 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, 82397 + ... + 519110.

It is an arithmetic number, because the mean of its divisors is an integer number (32836020966).

Almost surely, 2^131343263999 is an apocalyptic number.

131343263999 is a deficient number, since it is larger than the sum of its proper divisors (819865).

131343263999 is an equidigital number, since it uses as much as digits as its factorization.

131343263999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819864.

The product of its digits is 2834352, while the sum is 53.

The spelling of 131343263999 in words is "one hundred thirty-one billion, three hundred forty-three million, two hundred sixty-three thousand, nine hundred ninety-nine".