440232042431 has 4 divisors (see below), whose sum is σ = 441277724664. Its totient is φ = 439186360200.

The previous prime is 440232042407. The next prime is 440232042473. The reversal of 440232042431 is 134240232044.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440232042431 is a prime.

It is a super-2 number, since 2×440232042431² (a number of 24 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 = 440232042394 and 440232042403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440232042631) 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, 522840485 + ... + 522841326.

It is an arithmetic number, because the mean of its divisors is an integer number (110319431166).

Almost surely, 2^440232042431 is an apocalyptic number.

440232042431 is a deficient number, since it is larger than the sum of its proper divisors (1045682233).

440232042431 is a wasteful number, since it uses less digits than its factorization.

440232042431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045682232.

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

Adding to 440232042431 its reverse (134240232044), we get a palindrome (574472274475).

The spelling of 440232042431 in words is "four hundred forty billion, two hundred thirty-two million, forty-two thousand, four hundred thirty-one".