131630138 has 16 divisors (see below), whose sum is σ = 212673120. Its totient is φ = 60900336.

The previous prime is 131630137. The next prime is 131630141. The reversal of 131630138 is 831036131.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (131630137) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 38645 + ... + 41912.

It is an arithmetic number, because the mean of its divisors is an integer number (13292070).

Almost surely, 2^131630138 is an apocalyptic number.

131630138 is a deficient number, since it is larger than the sum of its proper divisors (81042982).

131630138 is a wasteful number, since it uses less digits than its factorization.

131630138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80621.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 131630138 is about 11473.0178244436. The cubic root of 131630138 is about 508.6883351863.

Adding to 131630138 its reverse (831036131), we get a palindrome (962666269).

The spelling of 131630138 in words is "one hundred thirty-one million, six hundred thirty thousand, one hundred thirty-eight".