440431032115523 has 4 divisors (see below), whose sum is σ = 440449742833320. Its totient is φ = 440412321397728.

The previous prime is 440431032115519. The next prime is 440431032115531. The reversal of 440431032115523 is 325511230134044.

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 440431032115523 - 2² = 440431032115519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440431032115553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9355323590 + ... + 9355370667.

It is an arithmetic number, because the mean of its divisors is an integer number (110112435708330).

Almost surely, 2^{440431032115523} is an apocalyptic number.

440431032115523 is a deficient number, since it is larger than the sum of its proper divisors (18710717797).

440431032115523 is a wasteful number, since it uses less digits than its factorization.

440431032115523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18710717796.

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 440431032115523 its reverse (325511230134044), we get a palindrome (765942262249567).

The spelling of 440431032115523 in words is "four hundred forty trillion, four hundred thirty-one billion, thirty-two million, one hundred fifteen thousand, five hundred twenty-three".