131303131 has 4 divisors (see below), whose sum is σ = 132603264. Its totient is φ = 130003000.

The previous prime is 131303119. The next prime is 131303147.

131303131 is nontrivially palindromic in base 10.

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 131303131 - 2²⁵ = 97748699 is a prime.

It is a super-2 number, since 2×131303131² = 34481024420806322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131300131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649915 + ... + 650116.

It is an arithmetic number, because the mean of its divisors is an integer number (33150816).

Almost surely, 2^131303131 is an apocalyptic number.

131303131 is a deficient number, since it is larger than the sum of its proper divisors (1300133).

131303131 is a wasteful number, since it uses less digits than its factorization.

131303131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300132.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 131303131 is about 11458.7578297126. The cubic root of 131303131 is about 508.2667433213.

It can be divided in two parts, 13130 and 3131, that added together give a palindrome (16261).

The spelling of 131303131 in words is "one hundred thirty-one million, three hundred three thousand, one hundred thirty-one".