211223042 has 16 divisors (see below), whose sum is σ = 318942360. Its totient is φ = 104911872.

The previous prime is 211223041. The next prime is 211223059. The reversal of 211223042 is 240322112.

It can be written as a sum of positive squares in 4 ways, for example, as 87590881 + 123632161 = 9359^2 + 11119^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 211223042.

It is not an unprimeable number, because it can be changed into a prime (211223041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355898 + ... + 356490.

Almost surely, 2^211223042 is an apocalyptic number.

211223042 is a deficient number, since it is larger than the sum of its proper divisors (107719318).

211223042 is a wasteful number, since it uses less digits than its factorization.

211223042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 211223042 is about 14533.5144407676. The cubic root of 211223042 is about 595.5438776273.

Adding to 211223042 its reverse (240322112), we get a palindrome (451545154).

The spelling of 211223042 in words is "two hundred eleven million, two hundred twenty-three thousand, forty-two".