42040444231 has 2 divisors, whose sum is σ = 42040444232. Its totient is φ = 42040444230.

The previous prime is 42040444163. The next prime is 42040444261. The reversal of 42040444231 is 13244404024.

42040444231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42040444231 - 2⁹ = 42040443719 is a prime.

It is a super-2 number, since 2×42040444231² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42040444231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42040444261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21020222115 + 21020222116.

It is an arithmetic number, because the mean of its divisors is an integer number (21020222116).

Almost surely, 2^42040444231 is an apocalyptic number.

42040444231 is a deficient number, since it is larger than the sum of its proper divisors (1).

42040444231 is an equidigital number, since it uses as much as digits as its factorization.

42040444231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 42040444231 its reverse (13244404024), we get a palindrome (55284848255).

The spelling of 42040444231 in words is "forty-two billion, forty million, four hundred forty-four thousand, two hundred thirty-one".