243112212 has 48 divisors (see below), whose sum is σ = 720334720. Its totient is φ = 69460416.

The previous prime is 243112211. The next prime is 243112213. The reversal of 243112212 is 212211342.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (243112211) and next prime (243112213).

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243112211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160033 + ... + 161544.

Almost surely, 2^243112212 is an apocalyptic number.

It is an amenable number.

243112212 is an abundant number, since it is smaller than the sum of its proper divisors (477222508).

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

243112212 is a wasteful number, since it uses less digits than its factorization.

243112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321597 (or 321589 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 243112212 is about 15592.0560542861. The cubic root of 243112212 is about 624.1211857828.

Adding to 243112212 its reverse (212211342), we get a palindrome (455323554).

The spelling of 243112212 in words is "two hundred forty-three million, one hundred twelve thousand, two hundred twelve".