131207636 has 12 divisors (see below), whose sum is σ = 262415328. Its totient is φ = 56231832.

The previous prime is 131207633. The next prime is 131207647. The reversal of 131207636 is 636702131.

131207636 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 131207599 and 131207608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131207633) 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 3 ways as a sum of consecutive naturals, for example, 2342966 + ... + 2343021.

It is an arithmetic number, because the mean of its divisors is an integer number (21867944).

Almost surely, 2^131207636 is an apocalyptic number.

It is an amenable number.

131207636 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.

131207636 is a wasteful number, since it uses less digits than its factorization.

131207636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4685998 (or 4685996 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 131207636 is about 11454.5901716299. The cubic root of 131207636 is about 508.1434949169.

Adding to 131207636 its reverse (636702131), we get a palindrome (767909767).

The spelling of 131207636 in words is "one hundred thirty-one million, two hundred seven thousand, six hundred thirty-six".