212544022 has 4 divisors (see below), whose sum is σ = 318816036. Its totient is φ = 106272010.

The previous prime is 212544001. The next prime is 212544023. The reversal of 212544022 is 220445212.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×212544022² = 90349922575872968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 212543984 and 212544002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212544023) 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 as a sum of consecutive naturals, namely, 53136004 + ... + 53136007.

It is an arithmetic number, because the mean of its divisors is an integer number (79704009).

Almost surely, 2^212544022 is an apocalyptic number.

212544022 is a deficient number, since it is larger than the sum of its proper divisors (106272014).

212544022 is a wasteful number, since it uses less digits than its factorization.

212544022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106272013.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 212544022 is about 14578.8896010636. The cubic root of 212544022 is about 596.7828005828.

Adding to 212544022 its reverse (220445212), we get a palindrome (432989234).

The spelling of 212544022 in words is "two hundred twelve million, five hundred forty-four thousand, twenty-two".