212544442 has 16 divisors (see below), whose sum is σ = 355889952. Its totient is φ = 94363920.

The previous prime is 212544439. The next prime is 212544443. The reversal of 212544442 is 244445212.

It is a self number, because there is not a number n which added to its sum of digits gives 212544442.

It is not an unprimeable number, because it can be changed into a prime (212544443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111393 + ... + 113284.

It is an arithmetic number, because the mean of its divisors is an integer number (22243122).

Almost surely, 2^212544442 is an apocalyptic number.

212544442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212544442 is a deficient number, since it is larger than the sum of its proper divisors (143345510).

212544442 is a wasteful number, since it uses less digits than its factorization.

212544442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224733.

The product of its digits is 10240, while the sum is 28.

The square root of 212544442 is about 14578.9040054457. The cubic root of 212544442 is about 596.7831936757.

Adding to 212544442 its reverse (244445212), we get a palindrome (456989654).

The spelling of 212544442 in words is "two hundred twelve million, five hundred forty-four thousand, four hundred forty-two".