131251326265 has 4 divisors (see below), whose sum is σ = 157501591524. Its totient is φ = 105001061008.

The previous prime is 131251326257. The next prime is 131251326289. The reversal of 131251326265 is 562623152131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19839567609 + 111411758656 = 140853^2 + 333784^2 .

It is a cyclic number.

It is not a de Polignac number, because 131251326265 - 2³ = 131251326257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 13125132622 + ... + 13125132631.

It is an arithmetic number, because the mean of its divisors is an integer number (39375397881).

Almost surely, 2^131251326265 is an apocalyptic number.

It is an amenable number.

131251326265 is a deficient number, since it is larger than the sum of its proper divisors (26250265259).

131251326265 is an equidigital number, since it uses as much as digits as its factorization.

131251326265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26250265258.

The product of its digits is 64800, while the sum is 37.

Adding to 131251326265 its reverse (562623152131), we get a palindrome (693874478396).

The spelling of 131251326265 in words is "one hundred thirty-one billion, two hundred fifty-one million, three hundred twenty-six thousand, two hundred sixty-five".