131506885 has 24 divisors (see below), whose sum is σ = 170709336. Its totient is φ = 97182720.

The previous prime is 131506873. The next prime is 131506889. The reversal of 131506885 is 588605131.

It can be written as a sum of positive squares in 4 ways, for example, as 244036 + 131262849 = 494^2 + 11457^2 .

It is not a de Polignac number, because 131506885 - 2⁵ = 131506853 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 (131506889) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73117 + ... + 74893.

It is an arithmetic number, because the mean of its divisors is an integer number (7112889).

Almost surely, 2^131506885 is an apocalyptic number.

It is an amenable number.

131506885 is a deficient number, since it is larger than the sum of its proper divisors (39202451).

131506885 is a wasteful number, since it uses less digits than its factorization.

131506885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861 (or 1842 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 131506885 is about 11467.6451375162. The cubic root of 131506885 is about 508.5295140541.

The spelling of 131506885 in words is "one hundred thirty-one million, five hundred six thousand, eight hundred eighty-five".