223420212 has 18 divisors (see below), whose sum is σ = 564756738. Its totient is φ = 74473392.

The previous prime is 223420201. The next prime is 223420213. The reversal of 223420212 is 212024322.

223420212 is a `hidden beast` number, since 223 + 420 + 21 + 2 = 666.

223420212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 222487056 + 933156 = 14916^2 + 966^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×223420212² = 99833182260249888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223420213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3103023 + ... + 3103094.

Almost surely, 2^223420212 is an apocalyptic number.

It is an amenable number.

223420212 is an abundant number, since it is smaller than the sum of its proper divisors (341336526).

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

223420212 is a wasteful number, since it uses less digits than its factorization.

223420212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6206127 (or 6206122 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 223420212 is about 14947.2476396158. The cubic root of 223420212 is about 606.7933601413.

Adding to 223420212 its reverse (212024322), we get a palindrome (435444534).

The spelling of 223420212 in words is "two hundred twenty-three million, four hundred twenty thousand, two hundred twelve".