131040431 has 4 divisors (see below), whose sum is σ = 131064864. Its totient is φ = 131016000.

The previous prime is 131040389. The next prime is 131040457. The reversal of 131040431 is 134040131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134040131 = 3623 ⋅36997.

It is a cyclic number.

It is not a de Polignac number, because 131040431 - 2¹⁸ = 130778287 is a prime.

It is a super-2 number, since 2×131040431² = 34343189113331522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131040461) 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, 290 + ... + 16191.

It is an arithmetic number, because the mean of its divisors is an integer number (32766216).

Almost surely, 2^131040431 is an apocalyptic number.

131040431 is a deficient number, since it is larger than the sum of its proper divisors (24433).

131040431 is an equidigital number, since it uses as much as digits as its factorization.

131040431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24432.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 131040431 is about 11447.2892424364. The cubic root of 131040431 is about 507.9275515650.

Adding to 131040431 its reverse (134040131), we get a palindrome (265080562).

The spelling of 131040431 in words is "one hundred thirty-one million, forty thousand, four hundred thirty-one".