131331161505 has 16 divisors (see below), whose sum is σ = 221189325120. Its totient is φ = 66356797248.

The previous prime is 131331161503. The next prime is 131331161509. The reversal of 131331161505 is 505161133131.

It is not a de Polignac number, because 131331161505 - 2¹ = 131331161503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131331161503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230405262 + ... + 230405831.

It is an arithmetic number, because the mean of its divisors is an integer number (13824332820).

Almost surely, 2^131331161505 is an apocalyptic number.

131331161505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131331161505 is a deficient number, since it is larger than the sum of its proper divisors (89858163615).

131331161505 is a wasteful number, since it uses less digits than its factorization.

131331161505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460811120.

The product of its (nonzero) digits is 4050, while the sum is 30.

Adding to 131331161505 its reverse (505161133131), we get a palindrome (636492294636).

The spelling of 131331161505 in words is "one hundred thirty-one billion, three hundred thirty-one million, one hundred sixty-one thousand, five hundred five".