131311631814 has 64 divisors (see below), whose sum is σ = 294721569792. Its totient is φ = 38652768000.

The previous prime is 131311631791. The next prime is 131311631831. The reversal of 131311631814 is 418136113131.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1463139 + ... + 1550289.

It is an arithmetic number, because the mean of its divisors is an integer number (4605024528).

Almost surely, 2^131311631814 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131311631814, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147360784896).

131311631814 is an abundant number, since it is smaller than the sum of its proper divisors (163409937978).

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

131311631814 is a wasteful number, since it uses less digits than its factorization.

131311631814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87821.

The product of its digits is 5184, while the sum is 33.

Adding to 131311631814 its reverse (418136113131), we get a palindrome (549447744945).

The spelling of 131311631814 in words is "one hundred thirty-one billion, three hundred eleven million, six hundred thirty-one thousand, eight hundred fourteen".