131131563 has 4 divisors (see below), whose sum is σ = 174842088. Its totient is φ = 87421040.

The previous prime is 131131543. The next prime is 131131577. The reversal of 131131563 is 365131131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 365131131 = 3 ⋅121710377.

It is a cyclic number.

It is not a de Polignac number, because 131131563 - 2⁸ = 131131307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131131543) 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, 21855258 + ... + 21855263.

It is an arithmetic number, because the mean of its divisors is an integer number (43710522).

Almost surely, 2^131131563 is an apocalyptic number.

131131563 is a deficient number, since it is larger than the sum of its proper divisors (43710525).

131131563 is an equidigital number, since it uses as much as digits as its factorization.

131131563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43710524.

The product of its digits is 810, while the sum is 24.

The square root of 131131563 is about 11451.2690563099. The cubic root of 131131563 is about 508.0452702645.

Adding to 131131563 its reverse (365131131), we get a palindrome (496262694).

The spelling of 131131563 in words is "one hundred thirty-one million, one hundred thirty-one thousand, five hundred sixty-three".