131118218 has 24 divisors (see below), whose sum is σ = 249588864. Its totient is φ = 51084600.

The previous prime is 131118209. The next prime is 131118241. The reversal of 131118218 is 812811131.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59738 + ... + 61893.

It is an arithmetic number, because the mean of its divisors is an integer number (10399536).

Almost surely, 2^131118218 is an apocalyptic number.

131118218 is a deficient number, since it is larger than the sum of its proper divisors (118470646).

131118218 is a wasteful number, since it uses less digits than its factorization.

131118218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121658 (or 121651 counting only the distinct ones).

The product of its digits is 384, while the sum is 26.

The square root of 131118218 is about 11450.6863549745. The cubic root of 131118218 is about 508.0280354255.

Adding to 131118218 its reverse (812811131), we get a palindrome (943929349).

The spelling of 131118218 in words is "one hundred thirty-one million, one hundred eighteen thousand, two hundred eighteen".