131311431431 has 4 divisors (see below), whose sum is σ = 131322151632. Its totient is φ = 131300711232.

The previous prime is 131311431353. The next prime is 131311431457. The reversal of 131311431431 is 134134113131.

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 131311431431 - 2¹⁰ = 131311430407 is a prime.

It is a super-2 number, since 2×131311431431² (a number of 23 digits) contains 22 as substring.

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 131311431431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131311431491) 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, 5341706 + ... + 5366231.

It is an arithmetic number, because the mean of its divisors is an integer number (32830537908).

Almost surely, 2^131311431431 is an apocalyptic number.

131311431431 is a deficient number, since it is larger than the sum of its proper divisors (10720201).

131311431431 is a wasteful number, since it uses less digits than its factorization.

131311431431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10720200.

The product of its digits is 1296, while the sum is 26.

Adding to 131311431431 its reverse (134134113131), we get a palindrome (265445544562).

The spelling of 131311431431 in words is "one hundred thirty-one billion, three hundred eleven million, four hundred thirty-one thousand, four hundred thirty-one".