131682181 has 4 divisors (see below), whose sum is σ = 131717664. Its totient is φ = 131646700.

The previous prime is 131682167. The next prime is 131682227. The reversal of 131682181 is 181286131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131682181 - 2⁷ = 131682053 is a prime.

It is a super-2 number, since 2×131682181² = 34680393585833522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131682281) 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, 11425 + ... + 19846.

It is an arithmetic number, because the mean of its divisors is an integer number (32929416).

Almost surely, 2^131682181 is an apocalyptic number.

It is an amenable number.

131682181 is a deficient number, since it is larger than the sum of its proper divisors (35483).

131682181 is an equidigital number, since it uses as much as digits as its factorization.

131682181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35482.

The product of its digits is 2304, while the sum is 31.

The square root of 131682181 is about 11475.2856609324. The cubic root of 131682181 is about 508.7553668940.

The spelling of 131682181 in words is "one hundred thirty-one million, six hundred eighty-two thousand, one hundred eighty-one".