131132505 has 16 divisors (see below), whose sum is σ = 239785344. Its totient is φ = 59946240.

The previous prime is 131132501. The next prime is 131132537. The reversal of 131132505 is 505231131.

It is not a de Polignac number, because 131132505 - 2² = 131132501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (131132501) 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, 624336 + ... + 624545.

It is an arithmetic number, because the mean of its divisors is an integer number (14986584).

Almost surely, 2^131132505 is an apocalyptic number.

131132505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

131132505 is a deficient number, since it is larger than the sum of its proper divisors (108652839).

131132505 is a wasteful number, since it uses less digits than its factorization.

131132505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248896.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 131132505 is about 11451.3101870485. The cubic root of 131132505 is about 508.0464867972.

Adding to 131132505 its reverse (505231131), we get a palindrome (636363636).

The spelling of 131132505 in words is "one hundred thirty-one million, one hundred thirty-two thousand, five hundred five".