131881382 has 4 divisors (see below), whose sum is σ = 197822076. Its totient is φ = 65940690.

The previous prime is 131881381. The next prime is 131881397. The reversal of 131881382 is 283188131.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131881381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32970344 + ... + 32970347.

It is an arithmetic number, because the mean of its divisors is an integer number (49455519).

Almost surely, 2^131881382 is an apocalyptic number.

131881382 is a deficient number, since it is larger than the sum of its proper divisors (65940694).

131881382 is an equidigital number, since it uses as much as digits as its factorization.

131881382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65940693.

The product of its digits is 9216, while the sum is 35.

The square root of 131881382 is about 11483.9619469937. The cubic root of 131881382 is about 509.0117759674.

The spelling of 131881382 in words is "one hundred thirty-one million, eight hundred eighty-one thousand, three hundred eighty-two".