131326506 has 24 divisors (see below), whose sum is σ = 285068160. Its totient is φ = 43694376.

The previous prime is 131326451. The next prime is 131326523. The reversal of 131326506 is 605623131.

131326506 is a `hidden beast` number, since 1 + 3 + 1 + 3 + 2 + 650 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 131326506.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3655 + ... + 16613.

It is an arithmetic number, because the mean of its divisors is an integer number (11877840).

Almost surely, 2^131326506 is an apocalyptic number.

131326506 is an abundant number, since it is smaller than the sum of its proper divisors (153741654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131326506 is a wasteful number, since it uses less digits than its factorization.

131326506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13530 (or 13527 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 131326506 is about 11459.7777465359. Note that the first 4 decimals coincide. The cubic root of 131326506 is about 508.2969026178.

Adding to 131326506 its reverse (605623131), we get a palindrome (736949637).

The spelling of 131326506 in words is "one hundred thirty-one million, three hundred twenty-six thousand, five hundred six".