212210244 has 72 divisors (see below), whose sum is σ = 553764120. Its totient is φ = 68470272.

The previous prime is 212210237. The next prime is 212210249. The reversal of 212210244 is 442012212.

212210244 is a `hidden beast` number, since 212 + 210 + 244 = 666.

212210244 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 37970244 + 174240000 = 6162^2 + 13200^2 .

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

212210244 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (212210249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 416662 + ... + 417170.

Almost surely, 2^212210244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212210244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276882060).

212210244 is an abundant number, since it is smaller than the sum of its proper divisors (341553876).

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

212210244 is a wasteful number, since it uses less digits than its factorization.

212210244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869 (or 864 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 212210244 is about 14567.4377980481. The cubic root of 212210244 is about 596.4702420685.

Adding to 212210244 its reverse (442012212), we get a palindrome (654222456).

The spelling of 212210244 in words is "two hundred twelve million, two hundred ten thousand, two hundred forty-four".