131812 has 12 divisors (see below), whose sum is σ = 238336. Its totient is φ = 63720.

The previous prime is 131797. The next prime is 131837. The reversal of 131812 is 218131.

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

It is a d-powerful number, because it can be written as 1 + 3⁶ + 8 + 1 + 1 + 2¹⁷ .

It is a congruent number.

It is an unprimeable number.

131812 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408 + ... + 655.

2¹³¹⁸¹² is an apocalyptic number.

It is an amenable number.

131812 is a deficient number, since it is larger than the sum of its proper divisors (106524).

131812 is a wasteful number, since it uses less digits than its factorization.

131812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098 (or 1096 counting only the distinct ones).

The product of its digits is 48, while the sum is 16.

The square root of 131812 is about 363.0592238189. The cubic root of 131812 is about 50.8922497634.

Adding to 131812 its reverse (218131), we get a palindrome (349943).

It can be divided in two parts, 13181 and 2, that multiplied together give a palindrome (26362).

The spelling of 131812 in words is "one hundred thirty-one thousand, eight hundred twelve".