211223030 has 16 divisors (see below), whose sum is σ = 396732384. Its totient is φ = 80815680.

The previous prime is 211222997. The next prime is 211223039. The reversal of 211223030 is 30322112.

It is a happy number.

211223030 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 211222996 and 211223014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211223039) 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, 458951 + ... + 459410.

It is an arithmetic number, because the mean of its divisors is an integer number (24795774).

Almost surely, 2^211223030 is an apocalyptic number.

211223030 is a deficient number, since it is larger than the sum of its proper divisors (185509354).

211223030 is a wasteful number, since it uses less digits than its factorization.

211223030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918391.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 211223030 is about 14533.5140279287. The cubic root of 211223030 is about 595.5438663493.

Adding to 211223030 its reverse (30322112), we get a palindrome (241545142).

The spelling of 211223030 in words is "two hundred eleven million, two hundred twenty-three thousand, thirty".