431422221 has 8 divisors (see below), whose sum is σ = 575646400. Its totient is φ = 287406432.

The previous prime is 431422217. The next prime is 431422291. The reversal of 431422221 is 122224134.

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

It is not a de Polignac number, because 431422221 - 2² = 431422217 is a prime.

It is a super-2 number, since 2×431422221² = 372250265545145682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431422291) 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, 47200 + ... + 55593.

It is an arithmetic number, because the mean of its divisors is an integer number (71955800).

Almost surely, 2^431422221 is an apocalyptic number.

It is an amenable number.

431422221 is a deficient number, since it is larger than the sum of its proper divisors (144224179).

431422221 is a wasteful number, since it uses less digits than its factorization.

431422221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104195.

The product of its digits is 768, while the sum is 21.

The square root of 431422221 is about 20770.7058377899. The cubic root of 431422221 is about 755.6154629458.

Adding to 431422221 its reverse (122224134), we get a palindrome (553646355).

The spelling of 431422221 in words is "four hundred thirty-one million, four hundred twenty-two thousand, two hundred twenty-one".