42105532031 has 4 divisors (see below), whose sum is σ = 42255374064. Its totient is φ = 41955690000.

The previous prime is 42105532009. The next prime is 42105532043. The reversal of 42105532031 is 13023550124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42105532031 is a prime.

It is a super-2 number, since 2×42105532031² (a number of 22 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 (42105532531) 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, 74920595 + ... + 74921156.

It is an arithmetic number, because the mean of its divisors is an integer number (10563843516).

Almost surely, 2^42105532031 is an apocalyptic number.

42105532031 is a deficient number, since it is larger than the sum of its proper divisors (149842033).

42105532031 is a wasteful number, since it uses less digits than its factorization.

42105532031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149842032.

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 42105532031 in words is "forty-two billion, one hundred five million, five hundred thirty-two thousand, thirty-one".