131432420440423 has 4 divisors (see below), whose sum is σ = 131636825449528. Its totient is φ = 131228015431320.

The previous prime is 131432420440379. The next prime is 131432420440441. The reversal of 131432420440423 is 324044024234131.

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 131432420440423 - 2²¹ = 131432418343271 is a prime.

It is a super-2 number, since 2×131432420440423² (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 (131432420449423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102202503588 + ... + 102202504873.

It is an arithmetic number, because the mean of its divisors is an integer number (32909206362382).

Almost surely, 2^{131432420440423} is an apocalyptic number.

131432420440423 is a deficient number, since it is larger than the sum of its proper divisors (204405009105).

131432420440423 is an equidigital number, since it uses as much as digits as its factorization.

131432420440423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204405009104.

The product of its (nonzero) digits is 221184, while the sum is 37.

Adding to 131432420440423 its reverse (324044024234131), we get a palindrome (455476444674554).

The spelling of 131432420440423 in words is "one hundred thirty-one trillion, four hundred thirty-two billion, four hundred twenty million, four hundred forty thousand, four hundred twenty-three".