222420212 has 36 divisors (see below), whose sum is σ = 472479840. Its totient is φ = 91176624.

The previous prime is 222420199. The next prime is 222420217. The reversal of 222420212 is 212024222.

It is a super-2 number, since 2×222420212² = 98941501412249888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222420217) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20162 + ... + 29177.

It is an arithmetic number, because the mean of its divisors is an integer number (13124440).

Almost surely, 2^222420212 is an apocalyptic number.

It is an amenable number.

222420212 is an abundant number, since it is smaller than the sum of its proper divisors (250059628).

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

222420212 is a wasteful number, since it uses less digits than its factorization.

222420212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49380 (or 49371 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 222420212 is about 14913.7591505294. The cubic root of 222420212 is about 605.8866965317.

Adding to 222420212 its reverse (212024222), we get a palindrome (434444434).

The spelling of 222420212 in words is "two hundred twenty-two million, four hundred twenty thousand, two hundred twelve".