131431763 has 4 divisors (see below), whose sum is σ = 133659480. Its totient is φ = 129204048.

The previous prime is 131431753. The next prime is 131431789. The reversal of 131431763 is 367134131.

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

It is a cyclic number.

It is not a de Polignac number, because 131431763 - 2⁸ = 131431507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131431753) 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, 1113770 + ... + 1113887.

It is an arithmetic number, because the mean of its divisors is an integer number (33414870).

Almost surely, 2^131431763 is an apocalyptic number.

131431763 is a deficient number, since it is larger than the sum of its proper divisors (2227717).

131431763 is an equidigital number, since it uses as much as digits as its factorization.

131431763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2227716.

The product of its digits is 4536, while the sum is 29.

The square root of 131431763 is about 11464.3692805143. The cubic root of 131431763 is about 508.4326648015.

Adding to 131431763 its reverse (367134131), we get a palindrome (498565894).

The spelling of 131431763 in words is "one hundred thirty-one million, four hundred thirty-one thousand, seven hundred sixty-three".