42442220431 has 6 divisors (see below), whose sum is σ = 45958144200. Its totient is φ = 39177434088.

The previous prime is 42442220419. The next prime is 42442220437. The reversal of 42442220431 is 13402224424.

42442220431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42442220431 - 2¹¹ = 42442218383 is a prime.

It is a super-2 number, since 2×42442220431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42442220431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42442220437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125568531 + ... + 125568868.

It is an arithmetic number, because the mean of its divisors is an integer number (7659690700).

Almost surely, 2^42442220431 is an apocalyptic number.

42442220431 is a deficient number, since it is larger than the sum of its proper divisors (3515923769).

42442220431 is a wasteful number, since it uses less digits than its factorization.

42442220431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251137425 (or 251137412 counting only the distinct ones).

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

Adding to 42442220431 its reverse (13402224424), we get a palindrome (55844444855).

The spelling of 42442220431 in words is "forty-two billion, four hundred forty-two million, two hundred twenty thousand, four hundred thirty-one".