42312005105 has 4 divisors (see below), whose sum is σ = 50774406132. Its totient is φ = 33849604080.

The previous prime is 42312005101. The next prime is 42312005123. The reversal of 42312005105 is 50150021324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21688747441 + 20623257664 = 147271^2 + 143608^2 .

It is not a de Polignac number, because 42312005105 - 2² = 42312005101 is a prime.

It is a super-2 number, since 2×42312005105² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42312005101) 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, 4231200506 + ... + 4231200515.

It is an arithmetic number, because the mean of its divisors is an integer number (12693601533).

Almost surely, 2^42312005105 is an apocalyptic number.

It is an amenable number.

42312005105 is a deficient number, since it is larger than the sum of its proper divisors (8462401027).

42312005105 is an equidigital number, since it uses as much as digits as its factorization.

42312005105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8462401026.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 42312005105 its reverse (50150021324), we get a palindrome (92462026429).

The spelling of 42312005105 in words is "forty-two billion, three hundred twelve million, five thousand, one hundred five".