131442332431 has 4 divisors (see below), whose sum is σ = 131466710592. Its totient is φ = 131417954272.

The previous prime is 131442332423. The next prime is 131442332507. The reversal of 131442332431 is 134233244131.

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 131442332431 - 2³ = 131442332423 is a prime.

It is a super-2 number, since 2×131442332431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131442332393 and 131442332402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131442312431) 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, 12180991 + ... + 12191776.

It is an arithmetic number, because the mean of its divisors is an integer number (32866677648).

Almost surely, 2^131442332431 is an apocalyptic number.

131442332431 is a deficient number, since it is larger than the sum of its proper divisors (24378161).

131442332431 is an equidigital number, since it uses as much as digits as its factorization.

131442332431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24378160.

The product of its digits is 20736, while the sum is 31.

Adding to 131442332431 its reverse (134233244131), we get a palindrome (265675576562).

The spelling of 131442332431 in words is "one hundred thirty-one billion, four hundred forty-two million, three hundred thirty-two thousand, four hundred thirty-one".