131322311 has 4 divisors (see below), whose sum is σ = 131527824. Its totient is φ = 131116800.

The previous prime is 131322299. The next prime is 131322313. The reversal of 131322311 is 113223131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113223131 = 7 ⋅16174733.

It is a cyclic number.

It is not a de Polignac number, because 131322311 - 2¹⁰ = 131321287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131322311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131322313) 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, 101795 + ... + 103076.

It is an arithmetic number, because the mean of its divisors is an integer number (32881956).

Almost surely, 2^131322311 is an apocalyptic number.

131322311 is a deficient number, since it is larger than the sum of its proper divisors (205513).

131322311 is an equidigital number, since it uses as much as digits as its factorization.

131322311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205512.

The product of its digits is 108, while the sum is 17.

The square root of 131322311 is about 11459.5947136013. The cubic root of 131322311 is about 508.2914903359.

Adding to 131322311 its reverse (113223131), we get a palindrome (244545442).

The spelling of 131322311 in words is "one hundred thirty-one million, three hundred twenty-two thousand, three hundred eleven".