131131263 has 4 divisors (see below), whose sum is σ = 174841688. Its totient is φ = 87420840.

The previous prime is 131131199. The next prime is 131131279. The reversal of 131131263 is 362131131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 131131263 - 2⁶ = 131131199 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 (131111263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21855208 + ... + 21855213.

It is an arithmetic number, because the mean of its divisors is an integer number (43710422).

Almost surely, 2^131131263 is an apocalyptic number.

131131263 is a deficient number, since it is larger than the sum of its proper divisors (43710425).

131131263 is an equidigital number, since it uses as much as digits as its factorization.

131131263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43710424.

The product of its digits is 324, while the sum is 21.

The square root of 131131263 is about 11451.2559573175. The cubic root of 131131263 is about 508.0448828325.

Adding to 131131263 its reverse (362131131), we get a palindrome (493262394).

The spelling of 131131263 in words is "one hundred thirty-one million, one hundred thirty-one thousand, two hundred sixty-three".