211123230 has 32 divisors (see below), whose sum is σ = 508815648. Its totient is φ = 56064000.

The previous prime is 211123207. The next prime is 211123261. The reversal of 211123230 is 32321112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7371 + ... + 21830.

It is an arithmetic number, because the mean of its divisors is an integer number (15900489).

Almost surely, 2^211123230 is an apocalyptic number.

211123230 is an abundant number, since it is smaller than the sum of its proper divisors (297692418).

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

211123230 is a wasteful number, since it uses less digits than its factorization.

211123230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29452.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 211123230 is about 14530.0801787189. The cubic root of 211123230 is about 595.4500561224.

Adding to 211123230 its reverse (32321112), we get a palindrome (243444342).

It can be divided in two parts, 21112 and 3230, that added together give a palindrome (24342).

The spelling of 211123230 in words is "two hundred eleven million, one hundred twenty-three thousand, two hundred thirty".