42131044423 has 4 divisors (see below), whose sum is σ = 45371894008. Its totient is φ = 38890194840.

The previous prime is 42131044343. The next prime is 42131044457. The reversal of 42131044423 is 32444013124.

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 42131044423 - 2¹³ = 42131036231 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42131044391 and 42131044400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42131044463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1620424773 + ... + 1620424798.

It is an arithmetic number, because the mean of its divisors is an integer number (11342973502).

Almost surely, 2^42131044423 is an apocalyptic number.

42131044423 is a deficient number, since it is larger than the sum of its proper divisors (3240849585).

42131044423 is a wasteful number, since it uses less digits than its factorization.

42131044423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240849584.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 42131044423 its reverse (32444013124), we get a palindrome (74575057547).

The spelling of 42131044423 in words is "forty-two billion, one hundred thirty-one million, forty-four thousand, four hundred twenty-three".