431423155855 has 16 divisors (see below), whose sum is σ = 518313817440. Its totient is φ = 344734745472.

The previous prime is 431423155837. The next prime is 431423155879. The reversal of 431423155855 is 558551324134.

It is a cyclic number.

It is not a de Polignac number, because 431423155855 - 2⁹ = 431423155343 is a prime.

It is a super-2 number, since 2×431423155855² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16305697 + ... + 16332133.

It is an arithmetic number, because the mean of its divisors is an integer number (32394613590).

Almost surely, 2^431423155855 is an apocalyptic number.

431423155855 is a deficient number, since it is larger than the sum of its proper divisors (86890661585).

431423155855 is a wasteful number, since it uses less digits than its factorization.

431423155855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30138.

The product of its digits is 1440000, while the sum is 46.

Adding to 431423155855 its reverse (558551324134), we get a palindrome (989974479989).

The spelling of 431423155855 in words is "four hundred thirty-one billion, four hundred twenty-three million, one hundred fifty-five thousand, eight hundred fifty-five".