42040424431 has 4 divisors (see below), whose sum is σ = 44513390592. Its totient is φ = 39567458272.

The previous prime is 42040424401. The next prime is 42040424449. The reversal of 42040424431 is 13442404024.

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 42040424431 - 2¹¹ = 42040422383 is a prime.

It is a super-2 number, since 2×42040424431² (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 42040424431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42040424401) 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, 1236483055 + ... + 1236483088.

It is an arithmetic number, because the mean of its divisors is an integer number (11128347648).

Almost surely, 2^42040424431 is an apocalyptic number.

42040424431 is a deficient number, since it is larger than the sum of its proper divisors (2472966161).

42040424431 is a wasteful number, since it uses less digits than its factorization.

42040424431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472966160.

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

Adding to 42040424431 its reverse (13442404024), we get a palindrome (55482828455).

The spelling of 42040424431 in words is "forty-two billion, forty million, four hundred twenty-four thousand, four hundred thirty-one".