212843812 has 12 divisors (see below), whose sum is σ = 372638476. Its totient is φ = 106375680.

The previous prime is 212843809. The next prime is 212843831. The reversal of 212843812 is 218348212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 132848676 + 79995136 = 11526^2 + 8944^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112 + ... + 20632.

Almost surely, 2^212843812 is an apocalyptic number.

It is an amenable number.

212843812 is a deficient number, since it is larger than the sum of its proper divisors (159794664).

212843812 is a wasteful number, since it uses less digits than its factorization.

212843812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23118 (or 23116 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 212843812 is about 14589.1676253308. The cubic root of 212843812 is about 597.0632530174.

The spelling of 212843812 in words is "two hundred twelve million, eight hundred forty-three thousand, eight hundred twelve".