212445550 has 12 divisors (see below), whose sum is σ = 395148816. Its totient is φ = 84978200.

The previous prime is 212445547. The next prime is 212445589. The reversal of 212445550 is 55544212.

It is a super-2 number, since 2×212445550² = 90266223429605000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2124406 + ... + 2124505.

It is an arithmetic number, because the mean of its divisors is an integer number (32929068).

Almost surely, 2^212445550 is an apocalyptic number.

212445550 is a deficient number, since it is larger than the sum of its proper divisors (182703266).

212445550 is a wasteful number, since it uses less digits than its factorization.

212445550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4248923 (or 4248918 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 212445550 is about 14575.5119978682. The cubic root of 212445550 is about 596.6906228569.

Adding to 212445550 its reverse (55544212), we get a palindrome (267989762).

It can be divided in two parts, 2124 and 45550, that added together give a palindrome (47674).

The spelling of 212445550 in words is "two hundred twelve million, four hundred forty-five thousand, five hundred fifty".