431243305 has 8 divisors (see below), whose sum is σ = 517635144. Its totient is φ = 344899200.

The previous prime is 431243303. The next prime is 431243317. The reversal of 431243305 is 503342134.

It can be written as a sum of positive squares in 4 ways, for example, as 131537961 + 299705344 = 11469^2 + 17312^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 431243305 - 2¹ = 431243303 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 431243305.

It is not an unprimeable number, because it can be changed into a prime (431243303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12495 + ... + 31915.

It is an arithmetic number, because the mean of its divisors is an integer number (64704393).

Almost surely, 2^431243305 is an apocalyptic number.

It is an amenable number.

431243305 is a deficient number, since it is larger than the sum of its proper divisors (86391839).

431243305 is a wasteful number, since it uses less digits than its factorization.

431243305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23867.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 431243305 is about 20766.3984600123. The cubic root of 431243305 is about 755.5109942201.

Adding to 431243305 its reverse (503342134), we get a palindrome (934585439).

The spelling of 431243305 in words is "four hundred thirty-one million, two hundred forty-three thousand, three hundred five".