131504005 has 4 divisors (see below), whose sum is σ = 157804812. Its totient is φ = 105203200.

The previous prime is 131504003. The next prime is 131504011. The reversal of 131504005 is 500405131.

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 80838081 + 50665924 = 8991^2 + 7118^2 .

It is not a de Polignac number, because 131504005 - 2¹ = 131504003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131504003) 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, 13150396 + ... + 13150405.

It is an arithmetic number, because the mean of its divisors is an integer number (39451203).

Almost surely, 2^131504005 is an apocalyptic number.

It is an amenable number.

131504005 is a deficient number, since it is larger than the sum of its proper divisors (26300807).

131504005 is an equidigital number, since it uses as much as digits as its factorization.

131504005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26300806.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 131504005 is about 11467.5195661486. The cubic root of 131504005 is about 508.5258017626.

Adding to 131504005 its reverse (500405131), we get a palindrome (631909136).

The spelling of 131504005 in words is "one hundred thirty-one million, five hundred four thousand, five".