131881881 has 8 divisors (see below), whose sum is σ = 176333760. Its totient is φ = 87675632.

The previous prime is 131881853. The next prime is 131881901. The reversal of 131881881 is 188188131.

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

It is a cyclic number.

It is not a de Polignac number, because 131881881 - 2⁹ = 131881369 is a prime.

It is a super-2 number, since 2×131881881² = 34785661072196322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131881811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60150 + ... + 62303.

It is an arithmetic number, because the mean of its divisors is an integer number (22041720).

Almost surely, 2^131881881 is an apocalyptic number.

It is an amenable number.

131881881 is a deficient number, since it is larger than the sum of its proper divisors (44451879).

131881881 is a wasteful number, since it uses less digits than its factorization.

131881881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122815.

The product of its digits is 12288, while the sum is 39.

The square root of 131881881 is about 11483.9836729247. The cubic root of 131881881 is about 509.0124179498.

The spelling of 131881881 in words is "one hundred thirty-one million, eight hundred eighty-one thousand, eight hundred eighty-one".