212203444 has 12 divisors (see below), whose sum is σ = 375830784. Its totient is φ = 104823224.

The previous prime is 212203441. The next prime is 212203447. The reversal of 212203444 is 444302212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (212203441) and next prime (212203447).

It is a super-2 number, since 2×212203444² = 90060603290922272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212203441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319252 + ... + 319915.

It is an arithmetic number, because the mean of its divisors is an integer number (31319232).

Almost surely, 2^212203444 is an apocalyptic number.

It is an amenable number.

212203444 is a deficient number, since it is larger than the sum of its proper divisors (163627340).

212203444 is a wasteful number, since it uses less digits than its factorization.

212203444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639254 (or 639252 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 212203444 is about 14567.2043989229. The cubic root of 212203444 is about 596.4638709640.

Adding to 212203444 its reverse (444302212), we get a palindrome (656505656).

The spelling of 212203444 in words is "two hundred twelve million, two hundred three thousand, four hundred forty-four".