431214221 has 4 divisors (see below), whose sum is σ = 431280444. Its totient is φ = 431148000.

The previous prime is 431214209. The next prime is 431214227. The reversal of 431214221 is 122412134.

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 6400900 + 424813321 = 2530^2 + 20611^2 .

It is a cyclic number.

It is not a de Polignac number, because 431214221 - 2¹⁰ = 431213197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 431214193 and 431214202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431214227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22130 + ... + 36771.

It is an arithmetic number, because the mean of its divisors is an integer number (107820111).

Almost surely, 2^431214221 is an apocalyptic number.

It is an amenable number.

431214221 is a deficient number, since it is larger than the sum of its proper divisors (66223).

431214221 is an equidigital number, since it uses as much as digits as its factorization.

431214221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66222.

The product of its digits is 384, while the sum is 20.

The square root of 431214221 is about 20765.6981823391. The cubic root of 431214221 is about 755.4940093954.

Adding to 431214221 its reverse (122412134), we get a palindrome (553626355).

The spelling of 431214221 in words is "four hundred thirty-one million, two hundred fourteen thousand, two hundred twenty-one".