431344042321 has 4 divisors (see below), whose sum is σ = 431347835044. Its totient is φ = 431340249600.

The previous prime is 431344042307. The next prime is 431344042373. The reversal of 431344042321 is 123240443134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123240443134 = 2 ⋅61620221567.

It can be written as a sum of positive squares in 2 ways, for example, as 249561192721 + 181782849600 = 499561^2 + 426360^2 .

It is a cyclic number.

It is not a de Polignac number, because 431344042321 - 2¹¹ = 431344040273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431344072321) 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, 1720320 + ... + 1955041.

It is an arithmetic number, because the mean of its divisors is an integer number (107836958761).

Almost surely, 2^431344042321 is an apocalyptic number.

It is an amenable number.

431344042321 is a deficient number, since it is larger than the sum of its proper divisors (3792723).

431344042321 is a wasteful number, since it uses less digits than its factorization.

431344042321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3792722.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 431344042321 its reverse (123240443134), we get a palindrome (554584485455).

The spelling of 431344042321 in words is "four hundred thirty-one billion, three hundred forty-four million, forty-two thousand, three hundred twenty-one".