131989218 has 8 divisors (see below), whose sum is σ = 263978448. Its totient is φ = 43996404.

The previous prime is 131989217. The next prime is 131989243. The reversal of 131989218 is 812989131.

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

131989218 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131989218.

It is not an unprimeable number, because it can be changed into a prime (131989217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10999096 + ... + 10999107.

It is an arithmetic number, because the mean of its divisors is an integer number (32997306).

Almost surely, 2^131989218 is an apocalyptic number.

131989218 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.

131989218 is a wasteful number, since it uses less digits than its factorization.

131989218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21998208.

The product of its digits is 31104, while the sum is 42.

The square root of 131989218 is about 11488.6560571722. The cubic root of 131989218 is about 509.1504734322.

The spelling of 131989218 in words is "one hundred thirty-one million, nine hundred eighty-nine thousand, two hundred eighteen".