131312507 has 4 divisors (see below), whose sum is σ = 131678640. Its totient is φ = 130946376.

The previous prime is 131312491. The next prime is 131312521. The reversal of 131312507 is 705213131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131312507 - 2⁴ = 131312491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131312527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182528 + ... + 183245.

It is an arithmetic number, because the mean of its divisors is an integer number (32919660).

Almost surely, 2^131312507 is an apocalyptic number.

131312507 is a deficient number, since it is larger than the sum of its proper divisors (366133).

131312507 is an equidigital number, since it uses as much as digits as its factorization.

131312507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366132.

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 131312507 is about 11459.1669417982. The cubic root of 131312507 is about 508.2788410159.

Adding to 131312507 its reverse (705213131), we get a palindrome (836525638).

The spelling of 131312507 in words is "one hundred thirty-one million, three hundred twelve thousand, five hundred seven".