211224045 has 16 divisors (see below), whose sum is σ = 355746240. Its totient is φ = 106723584.

The previous prime is 211224043. The next prime is 211224067. The reversal of 211224045 is 540422112.

It is not a de Polignac number, because 211224045 - 2¹ = 211224043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211224043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370284 + ... + 370853.

It is an arithmetic number, because the mean of its divisors is an integer number (22234140).

Almost surely, 2^211224045 is an apocalyptic number.

It is an amenable number.

211224045 is a deficient number, since it is larger than the sum of its proper divisors (144522195).

211224045 is a wasteful number, since it uses less digits than its factorization.

211224045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741164.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 211224045 is about 14533.5489471774. The cubic root of 211224045 is about 595.5448202794.

Adding to 211224045 its reverse (540422112), we get a palindrome (751646157).

The spelling of 211224045 in words is "two hundred eleven million, two hundred twenty-four thousand, forty-five".