131109881 has 16 divisors (see below), whose sum is σ = 158281728. Its totient is φ = 106218000.

The previous prime is 131109829. The next prime is 131109889. The reversal of 131109881 is 188901131.

It is not a de Polignac number, because 131109881 - 2²² = 126915577 is a prime.

It is a super-3 number, since 3×131109881³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131109889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2306 + ... + 16356.

It is an arithmetic number, because the mean of its divisors is an integer number (9892608).

Almost surely, 2^131109881 is an apocalyptic number.

It is an amenable number.

131109881 is a deficient number, since it is larger than the sum of its proper divisors (27171847).

131109881 is a wasteful number, since it uses less digits than its factorization.

131109881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14132.

The product of its (nonzero) digits is 1728, while the sum is 32.

The square root of 131109881 is about 11450.3223098741. The cubic root of 131109881 is about 508.0172677392.

The spelling of 131109881 in words is "one hundred thirty-one million, one hundred nine thousand, eight hundred eighty-one".