42161171431 has 4 divisors (see below), whose sum is σ = 42162687000. Its totient is φ = 42159655864.

The previous prime is 42161171411. The next prime is 42161171467. The reversal of 42161171431 is 13417116124.

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 42161171431 - 2¹⁹ = 42160647143 is a prime.

It is a super-2 number, since 2×42161171431² (a number of 22 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 = 42161171393 and 42161171402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42161171411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 715261 + ... + 771958.

It is an arithmetic number, because the mean of its divisors is an integer number (10540671750).

Almost surely, 2^42161171431 is an apocalyptic number.

42161171431 is a deficient number, since it is larger than the sum of its proper divisors (1515569).

42161171431 is a wasteful number, since it uses less digits than its factorization.

42161171431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515568.

The product of its digits is 4032, while the sum is 31.

Adding to 42161171431 its reverse (13417116124), we get a palindrome (55578287555).

The spelling of 42161171431 in words is "forty-two billion, one hundred sixty-one million, one hundred seventy-one thousand, four hundred thirty-one".