42440243231 has 4 divisors (see below), whose sum is σ = 42694376592. Its totient is φ = 42186109872.

The previous prime is 42440243213. The next prime is 42440243239. The reversal of 42440243231 is 13234204424.

42440243231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42440243231 - 2²² = 42436048927 is a prime.

It is a super-2 number, since 2×42440243231² (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 = 42440243194 and 42440243203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42440243239) 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, 127066430 + ... + 127066763.

It is an arithmetic number, because the mean of its divisors is an integer number (10673594148).

Almost surely, 2^42440243231 is an apocalyptic number.

42440243231 is a deficient number, since it is larger than the sum of its proper divisors (254133361).

42440243231 is a wasteful number, since it uses less digits than its factorization.

42440243231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254133360.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 42440243231 its reverse (13234204424), we get a palindrome (55674447655).

The spelling of 42440243231 in words is "forty-two billion, four hundred forty million, two hundred forty-three thousand, two hundred thirty-one".