131301315506 has 8 divisors (see below), whose sum is σ = 196974718380. Its totient is φ = 65643076048.

The previous prime is 131301315503. The next prime is 131301315661. The reversal of 131301315506 is 605513103131.

It can be written as a sum of positive squares in 2 ways, for example, as 129690015625 + 1611299881 = 360125^2 + 40141^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 3769181 + ... + 3803856.

Almost surely, 2^131301315506 is an apocalyptic number.

131301315506 is a deficient number, since it is larger than the sum of its proper divisors (65673402874).

131301315506 is an equidigital number, since it uses as much as digits as its factorization.

131301315506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7581708.

The product of its (nonzero) digits is 4050, while the sum is 29.

Adding to 131301315506 its reverse (605513103131), we get a palindrome (736814418637).

The spelling of 131301315506 in words is "one hundred thirty-one billion, three hundred one million, three hundred fifteen thousand, five hundred six".