421684222 has 4 divisors (see below), whose sum is σ = 632526336. Its totient is φ = 210842110.

The previous prime is 421684217. The next prime is 421684223. The reversal of 421684222 is 222486124.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421684223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105421054 + ... + 105421057.

It is an arithmetic number, because the mean of its divisors is an integer number (158131584).

Almost surely, 2^421684222 is an apocalyptic number.

421684222 is a deficient number, since it is larger than the sum of its proper divisors (210842114).

421684222 is a wasteful number, since it uses less digits than its factorization.

421684222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210842113.

The product of its digits is 12288, while the sum is 31.

The square root of 421684222 is about 20534.9512295501. The cubic root of 421684222 is about 749.8869293246.

The spelling of 421684222 in words is "four hundred twenty-one million, six hundred eighty-four thousand, two hundred twenty-two".