131312166 has 8 divisors (see below), whose sum is σ = 262624344. Its totient is φ = 43770720.

The previous prime is 131312147. The next prime is 131312177. The reversal of 131312166 is 661213131.

It is a sphenic number, since it is the product of 3 distinct primes.

131312166 is an admirable number.

It is a super-2 number, since 2×131312166² = 34485769879223112, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10942675 + ... + 10942686.

It is an arithmetic number, because the mean of its divisors is an integer number (32828043).

Almost surely, 2^131312166 is an apocalyptic number.

131312166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

131312166 is a wasteful number, since it uses less digits than its factorization.

131312166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21885366.

The product of its digits is 648, while the sum is 24.

The square root of 131312166 is about 11459.1520628710. The cubic root of 131312166 is about 508.2784010395.

Adding to 131312166 its reverse (661213131), we get a palindrome (792525297).

The spelling of 131312166 in words is "one hundred thirty-one million, three hundred twelve thousand, one hundred sixty-six".