42440244230431 has 2 divisors, whose sum is σ = 42440244230432. Its totient is φ = 42440244230430.

The previous prime is 42440244230411. The next prime is 42440244230543. The reversal of 42440244230431 is 13403244204424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42440244230431 - 2³¹ = 42438096746783 is a prime.

It is a super-2 number, since 2×42440244230431² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42440244230401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21220122115215 + 21220122115216.

It is an arithmetic number, because the mean of its divisors is an integer number (21220122115216).

Almost surely, 2^{42440244230431} is an apocalyptic number.

42440244230431 is a deficient number, since it is larger than the sum of its proper divisors (1).

42440244230431 is an equidigital number, since it uses as much as digits as its factorization.

42440244230431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 294912, while the sum is 37.

Adding to 42440244230431 its reverse (13403244204424), we get a palindrome (55843488434855).

The spelling of 42440244230431 in words is "forty-two trillion, four hundred forty billion, two hundred forty-four million, two hundred thirty thousand, four hundred thirty-one".