131881965 has 8 divisors (see below), whose sum is σ = 211011168. Its totient is φ = 70337040.

The previous prime is 131881957. The next prime is 131881969. The reversal of 131881965 is 569188131.

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

It is not a de Polignac number, because 131881965 - 2³ = 131881957 is a prime.

It is a super-2 number, since 2×131881965² = 34785705384522450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131881969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4396051 + ... + 4396080.

It is an arithmetic number, because the mean of its divisors is an integer number (26376396).

Almost surely, 2^131881965 is an apocalyptic number.

131881965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131881965 is a deficient number, since it is larger than the sum of its proper divisors (79129203).

131881965 is an equidigital number, since it uses as much as digits as its factorization.

131881965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8792139.

The product of its digits is 51840, while the sum is 42.

The square root of 131881965 is about 11483.9873301915. The cubic root of 131881965 is about 509.0125260188.

The spelling of 131881965 in words is "one hundred thirty-one million, eight hundred eighty-one thousand, nine hundred sixty-five".