131140018 has 4 divisors (see below), whose sum is σ = 196710030. Its totient is φ = 65570008.

The previous prime is 131140007. The next prime is 131140049. The reversal of 131140018 is 810041131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 810041131 = 103 ⋅7864477.

It can be written as a sum of positive squares in only one way, i.e., 85618009 + 45522009 = 9253^2 + 6747^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131139977 and 131140004.

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 as a sum of consecutive naturals, namely, 32785003 + ... + 32785006.

Almost surely, 2^131140018 is an apocalyptic number.

131140018 is a deficient number, since it is larger than the sum of its proper divisors (65570012).

131140018 is an equidigital number, since it uses as much as digits as its factorization.

131140018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65570011.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 131140018 is about 11451.6382234159. The cubic root of 131140018 is about 508.0561891472.

Adding to 131140018 its reverse (810041131), we get a palindrome (941181149).

The spelling of 131140018 in words is "one hundred thirty-one million, one hundred forty thousand, eighteen".