211243044 has 12 divisors (see below), whose sum is σ = 492900464. Its totient is φ = 70414344.

The previous prime is 211243031. The next prime is 211243049. The reversal of 211243044 is 440342112.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 211243044.

It is not an unprimeable number, because it can be changed into a prime (211243049) 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 3 ways as a sum of consecutive naturals, for example, 8801782 + ... + 8801805.

Almost surely, 2^211243044 is an apocalyptic number.

It is an amenable number.

211243044 is an abundant number, since it is smaller than the sum of its proper divisors (281657420).

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

211243044 is a wasteful number, since it uses less digits than its factorization.

211243044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17603594 (or 17603592 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 211243044 is about 14534.2025581041. The cubic root of 211243044 is about 595.5626755964.

Adding to 211243044 its reverse (440342112), we get a palindrome (651585156).

The spelling of 211243044 in words is "two hundred eleven million, two hundred forty-three thousand, forty-four".