131831712 has 120 divisors (see below), whose sum is σ = 391242852. Its totient is φ = 43545600.

The previous prime is 131831681. The next prime is 131831717. The reversal of 131831712 is 217138131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 123743376 + 8088336 = 11124^2 + 2844^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (131831717) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 469012 + ... + 469292.

Almost surely, 2^131831712 is an apocalyptic number.

131831712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131831712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195621426).

131831712 is an abundant number, since it is smaller than the sum of its proper divisors (259411140).

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

131831712 is a wasteful number, since it uses less digits than its factorization.

131831712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 467 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 131831712 is about 11481.7991621522. The cubic root of 131831712 is about 508.9478655321.

Adding to 131831712 its reverse (217138131), we get a palindrome (348969843).

The spelling of 131831712 in words is "one hundred thirty-one million, eight hundred thirty-one thousand, seven hundred twelve".