211044225 has 36 divisors (see below), whose sum is σ = 405901104. Its totient is φ = 96475680.

The previous prime is 211044221. The next prime is 211044259. The reversal of 211044225 is 522440112.

It is not a de Polignac number, because 211044225 - 2² = 211044221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (211044221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25039 + ... + 32388.

Almost surely, 2^211044225 is an apocalyptic number.

211044225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211044225 is a deficient number, since it is larger than the sum of its proper divisors (194856879).

211044225 is a wasteful number, since it uses less digits than its factorization.

211044225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57454 (or 57442 counting only the distinct ones).

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

The square root of 211044225 is about 14527.3612538547. The cubic root of 211044225 is about 595.3757718588.

Adding to 211044225 its reverse (522440112), we get a palindrome (733484337).

The spelling of 211044225 in words is "two hundred eleven million, forty-four thousand, two hundred twenty-five".