131301315505 has 4 divisors (see below), whose sum is σ = 157561578612. Its totient is φ = 105041052400.

The previous prime is 131301315503. The next prime is 131301315661. The reversal of 131301315505 is 505513103131.

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 83150912881 + 48150402624 = 288359^2 + 219432^2 .

It is not a de Polignac number, because 131301315505 - 2¹ = 131301315503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131301315503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13130131546 + ... + 13130131555.

It is an arithmetic number, because the mean of its divisors is an integer number (39390394653).

Almost surely, 2^131301315505 is an apocalyptic number.

It is an amenable number.

131301315505 is a deficient number, since it is larger than the sum of its proper divisors (26260263107).

131301315505 is an equidigital number, since it uses as much as digits as its factorization.

131301315505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26260263106.

The product of its (nonzero) digits is 3375, while the sum is 28.

Adding to 131301315505 its reverse (505513103131), we get a palindrome (636814418636).

The spelling of 131301315505 in words is "one hundred thirty-one billion, three hundred one million, three hundred fifteen thousand, five hundred five".