212212044 has 72 divisors (see below), whose sum is σ = 587321280. Its totient is φ = 64072800.

The previous prime is 212211997. The next prime is 212212051. The reversal of 212212044 is 440212212.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130267 + ... + 131885.

It is an arithmetic number, because the mean of its divisors is an integer number (8157240).

Almost surely, 2^212212044 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 212212044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293660640).

212212044 is an abundant number, since it is smaller than the sum of its proper divisors (375109236).

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

212212044 is a wasteful number, since it uses less digits than its factorization.

212212044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1971 (or 1966 counting only the distinct ones).

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

The square root of 212212044 is about 14567.4995795435. The cubic root of 212212044 is about 596.4719285146.

Adding to 212212044 its reverse (440212212), we get a palindrome (652424256).

The spelling of 212212044 in words is "two hundred twelve million, two hundred twelve thousand, forty-four".