431344321 has 4 divisors (see below), whose sum is σ = 431407872. Its totient is φ = 431280772.

The previous prime is 431344307. The next prime is 431344337. The reversal of 431344321 is 123443134.

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 a cyclic number.

It is not a de Polignac number, because 431344321 - 2²⁷ = 297126593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431344301) 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, 20185 + ... + 35638.

It is an arithmetic number, because the mean of its divisors is an integer number (107851968).

Almost surely, 2^431344321 is an apocalyptic number.

It is an amenable number.

431344321 is a deficient number, since it is larger than the sum of its proper divisors (63551).

431344321 is an equidigital number, since it uses as much as digits as its factorization.

431344321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63550.

The product of its digits is 3456, while the sum is 25.

The square root of 431344321 is about 20768.8305159438. The cubic root of 431344321 is about 755.5699808288.

Adding to 431344321 its reverse (123443134), we get a palindrome (554787455).

The spelling of 431344321 in words is "four hundred thirty-one million, three hundred forty-four thousand, three hundred twenty-one".