211223330 has 16 divisors (see below), whose sum is σ = 382722624. Its totient is φ = 83929200.

The previous prime is 211223321. The next prime is 211223371. The reversal of 211223330 is 33322112.

It is a junction number, because it is equal to n+sod(n) for n = 211223299 and 211223308.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 68432 + ... + 71451.

It is an arithmetic number, because the mean of its divisors is an integer number (23920164).

Almost surely, 2^211223330 is an apocalyptic number.

211223330 is a deficient number, since it is larger than the sum of its proper divisors (171499294).

211223330 is a wasteful number, since it uses less digits than its factorization.

211223330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140041.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 211223330 is about 14533.5243488976. The cubic root of 211223330 is about 595.5441482994.

Adding to 211223330 its reverse (33322112), we get a palindrome (244545442).

The spelling of 211223330 in words is "two hundred eleven million, two hundred twenty-three thousand, three hundred thirty".