42240143321 has 4 divisors (see below), whose sum is σ = 44724857652. Its totient is φ = 39755428992.

The previous prime is 42240143311. The next prime is 42240143329. The reversal of 42240143321 is 12334104224.

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 34330531225 + 7909612096 = 185285^2 + 88936^2 .

It is a cyclic number.

It is not a de Polignac number, because 42240143321 - 2¹⁴ = 42240126937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42240143329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1242357140 + ... + 1242357173.

It is an arithmetic number, because the mean of its divisors is an integer number (11181214413).

Almost surely, 2^42240143321 is an apocalyptic number.

It is an amenable number.

42240143321 is a deficient number, since it is larger than the sum of its proper divisors (2484714331).

42240143321 is a wasteful number, since it uses less digits than its factorization.

42240143321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484714330.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 42240143321 its reverse (12334104224), we get a palindrome (54574247545).

The spelling of 42240143321 in words is "forty-two billion, two hundred forty million, one hundred forty-three thousand, three hundred twenty-one".