431342321 has 4 divisors (see below), whose sum is σ = 435299700. Its totient is φ = 427384944.

The previous prime is 431342293. The next prime is 431342323. The reversal of 431342321 is 123243134.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 362369296 + 68973025 = 19036^2 + 8305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431342321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431342323) 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, 1978526 + ... + 1978743.

It is an arithmetic number, because the mean of its divisors is an integer number (108824925).

Almost surely, 2^431342321 is an apocalyptic number.

It is an amenable number.

431342321 is a deficient number, since it is larger than the sum of its proper divisors (3957379).

431342321 is a wasteful number, since it uses less digits than its factorization.

431342321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957378.

The product of its digits is 1728, while the sum is 23.

The square root of 431342321 is about 20768.7823668120. The cubic root of 431342321 is about 755.5688130515.

Adding to 431342321 its reverse (123243134), we get a palindrome (554585455).

The spelling of 431342321 in words is "four hundred thirty-one million, three hundred forty-two thousand, three hundred twenty-one".