421431222 has 8 divisors (see below), whose sum is σ = 842862456. Its totient is φ = 140477072.

The previous prime is 421431211. The next prime is 421431223. The reversal of 421431222 is 222134124.

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

421431222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421431223) 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, 35119263 + ... + 35119274.

It is an arithmetic number, because the mean of its divisors is an integer number (105357807).

Almost surely, 2^421431222 is an apocalyptic number.

421431222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421431222 is a wasteful number, since it uses less digits than its factorization.

421431222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70238542.

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

The square root of 421431222 is about 20528.7900763781. The cubic root of 421431222 is about 749.7369281795.

Adding to 421431222 its reverse (222134124), we get a palindrome (643565346).

It can be divided in two parts, 42143 and 1222, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 421431222 in words is "four hundred twenty-one million, four hundred thirty-one thousand, two hundred twenty-two".