212444430 has 128 divisors (see below), whose sum is σ = 584755200. Its totient is φ = 48921600.

The previous prime is 212444429. The next prime is 212444431. The reversal of 212444430 is 34444212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212444429) and next prime (212444431).

It is a self number, because there is not a number n which added to its sum of digits gives 212444430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212444431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 755890 + ... + 756170.

It is an arithmetic number, because the mean of its divisors is an integer number (4568400).

Almost surely, 2^212444430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212444430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292377600).

212444430 is an abundant number, since it is smaller than the sum of its proper divisors (372310770).

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

212444430 is a wasteful number, since it uses less digits than its factorization.

212444430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 212444430 is about 14575.4735772118. The cubic root of 212444430 is about 596.6895742829.

Adding to 212444430 its reverse (34444212), we get a palindrome (246888642).

The spelling of 212444430 in words is "two hundred twelve million, four hundred forty-four thousand, four hundred thirty".