131334431 has 2 divisors, whose sum is σ = 131334432. Its totient is φ = 131334430.

The previous prime is 131334421. The next prime is 131334449. The reversal of 131334431 is 134433131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131334431 - 2¹⁰ = 131333407 is a prime.

It is a super-2 number, since 2×131334431² = 34497465532187522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 131334397 and 131334406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131334421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65667215 + 65667216.

It is an arithmetic number, because the mean of its divisors is an integer number (65667216).

Almost surely, 2^131334431 is an apocalyptic number.

131334431 is a deficient number, since it is larger than the sum of its proper divisors (1).

131334431 is an equidigital number, since it uses as much as digits as its factorization.

131334431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 23.

The square root of 131334431 is about 11460.1235159138. The cubic root of 131334431 is about 508.3071269359.

Adding to 131334431 its reverse (134433131), we get a palindrome (265767562).

The spelling of 131334431 in words is "one hundred thirty-one million, three hundred thirty-four thousand, four hundred thirty-one".