131143134323431 has 4 divisors (see below), whose sum is σ = 138045404551000. Its totient is φ = 124240864095864.

The previous prime is 131143134323371. The next prime is 131143134323449. The reversal of 131143134323431 is 134323431341131.

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 131143134323431 - 2¹⁹ = 131143133799143 is a prime.

It is a super-2 number, since 2×131143134323431² (a number of 29 digits) 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 (131143134323471) 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, 3451135113756 + ... + 3451135113793.

It is an arithmetic number, because the mean of its divisors is an integer number (34511351137750).

Almost surely, 2^{131143134323431} is an apocalyptic number.

131143134323431 is a deficient number, since it is larger than the sum of its proper divisors (6902270227569).

131143134323431 is an equidigital number, since it uses as much as digits as its factorization.

131143134323431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6902270227568.

The product of its digits is 93312, while the sum is 37.

Adding to 131143134323431 its reverse (134323431341131), we get a palindrome (265466565664562).

The spelling of 131143134323431 in words is "one hundred thirty-one trillion, one hundred forty-three billion, one hundred thirty-four million, three hundred twenty-three thousand, four hundred thirty-one".