131145505 has 16 divisors (see below), whose sum is σ = 167529600. Its totient is φ = 98271360.

The previous prime is 131145473. The next prime is 131145523. The reversal of 131145505 is 505541131.

It is a happy number.

It is not a de Polignac number, because 131145505 - 2⁵ = 131145473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131145505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 700 + ... + 16210.

It is an arithmetic number, because the mean of its divisors is an integer number (10470600).

Almost surely, 2^131145505 is an apocalyptic number.

It is an amenable number.

131145505 is a deficient number, since it is larger than the sum of its proper divisors (36384095).

131145505 is a wasteful number, since it uses less digits than its factorization.

131145505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15624.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 131145505 is about 11451.8777936197. The cubic root of 131145505 is about 508.0632748699.

Adding to 131145505 its reverse (505541131), we get a palindrome (636686636).

The spelling of 131145505 in words is "one hundred thirty-one million, one hundred forty-five thousand, five hundred five".