131231143234312 has 64 divisors (see below), whose sum is σ = 269157650319360. Its totient is φ = 59488262246400.

The previous prime is 131231143234283. The next prime is 131231143234313. The reversal of 131231143234312 is 213432341132131.

It is a happy number.

It is a super-2 number, since 2×131231143234312² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131231143234313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314620648 + ... + 315037480.

It is an arithmetic number, because the mean of its divisors is an integer number (4205588286240).

Almost surely, 2^{131231143234312} is an apocalyptic number.

It is an amenable number.

131231143234312 is an abundant number, since it is smaller than the sum of its proper divisors (137926507085048).

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

131231143234312 is a wasteful number, since it uses less digits than its factorization.

131231143234312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426574 (or 426570 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

Adding to 131231143234312 its reverse (213432341132131), we get a palindrome (344663484366443).

The spelling of 131231143234312 in words is "one hundred thirty-one trillion, two hundred thirty-one billion, one hundred forty-three million, two hundred thirty-four thousand, three hundred twelve".