431441221 has 8 divisors (see below), whose sum is σ = 437711904. Its totient is φ = 425196240.

The previous prime is 431441203. The next prime is 431441251. The reversal of 431441221 is 122144134.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-431441221 is a prime.

It is a super-2 number, since 2×431441221² = 372283054355941682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 431441192 and 431441201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431441251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28770 + ... + 41116.

It is an arithmetic number, because the mean of its divisors is an integer number (54713988).

Almost surely, 2^431441221 is an apocalyptic number.

It is an amenable number.

431441221 is a deficient number, since it is larger than the sum of its proper divisors (6270683).

431441221 is a wasteful number, since it uses less digits than its factorization.

431441221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12851.

The product of its digits is 768, while the sum is 22.

The square root of 431441221 is about 20771.1632076781. The cubic root of 431441221 is about 755.6265553145.

Adding to 431441221 its reverse (122144134), we get a palindrome (553585355).

The spelling of 431441221 in words is "four hundred thirty-one million, four hundred forty-one thousand, two hundred twenty-one".