212240055 has 16 divisors (see below), whose sum is σ = 340351200. Its totient is φ = 112939008.

The previous prime is 212240003. The next prime is 212240069. The reversal of 212240055 is 550042212.

It is a happy number.

It is not a de Polignac number, because 212240055 - 2⁷ = 212239927 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9022 + ... + 22491.

It is an arithmetic number, because the mean of its divisors is an integer number (21271950).

Almost surely, 2^212240055 is an apocalyptic number.

212240055 is a deficient number, since it is larger than the sum of its proper divisors (128111145).

212240055 is a wasteful number, since it uses less digits than its factorization.

212240055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31970.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 212240055 is about 14568.4609688189. The cubic root of 212240055 is about 596.4981711975.

Adding to 212240055 its reverse (550042212), we get a palindrome (762282267).

The spelling of 212240055 in words is "two hundred twelve million, two hundred forty thousand, fifty-five".