431143217 has 4 divisors (see below), whose sum is σ = 432125760. Its totient is φ = 430160676.

The previous prime is 431143201. The next prime is 431143243. The reversal of 431143217 is 712341134.

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 431143217 - 2⁴ = 431143201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431163217) 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, 490613 + ... + 491490.

It is an arithmetic number, because the mean of its divisors is an integer number (108031440).

Almost surely, 2^431143217 is an apocalyptic number.

It is an amenable number.

431143217 is a deficient number, since it is larger than the sum of its proper divisors (982543).

431143217 is an equidigital number, since it uses as much as digits as its factorization.

431143217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982542.

The product of its digits is 2016, while the sum is 26.

The square root of 431143217 is about 20763.9884656104. The cubic root of 431143217 is about 755.4525404158.

The spelling of 431143217 in words is "four hundred thirty-one million, one hundred forty-three thousand, two hundred seventeen".