211244144 has 20 divisors (see below), whose sum is σ = 427081296. Its totient is φ = 101029632.

The previous prime is 211244129. The next prime is 211244153. The reversal of 211244144 is 441442112.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286649 + ... + 287384.

Almost surely, 2^211244144 is an apocalyptic number.

It is an amenable number.

211244144 is an abundant number, since it is smaller than the sum of its proper divisors (215837152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211244144 is a wasteful number, since it uses less digits than its factorization.

211244144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574064 (or 574058 counting only the distinct ones).

The product of its digits is 1024, while the sum is 23.

The square root of 211244144 is about 14534.2403998283. The cubic root of 211244144 is about 595.5637093469.

Adding to 211244144 its reverse (441442112), we get a palindrome (652686256).

The spelling of 211244144 in words is "two hundred eleven million, two hundred forty-four thousand, one hundred forty-four".