431344042221 has 4 divisors (see below), whose sum is σ = 575125389632. Its totient is φ = 287562694812.

The previous prime is 431344042189. The next prime is 431344042223. The reversal of 431344042221 is 122240443134.

431344042221 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 431344042221 - 2⁵ = 431344042189 is a prime.

It is a super-3 number, since 3×431344042221³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431344042223) 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, 71890673701 + ... + 71890673706.

It is an arithmetic number, because the mean of its divisors is an integer number (143781347408).

Almost surely, 2^431344042221 is an apocalyptic number.

It is an amenable number.

431344042221 is a deficient number, since it is larger than the sum of its proper divisors (143781347411).

431344042221 is a wasteful number, since it uses less digits than its factorization.

431344042221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143781347410.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 431344042221 its reverse (122240443134), we get a palindrome (553584485355).

The spelling of 431344042221 in words is "four hundred thirty-one billion, three hundred forty-four million, forty-two thousand, two hundred twenty-one".