213111223 has 8 divisors (see below), whose sum is σ = 231734048. Its totient is φ = 194806944.

The previous prime is 213111221. The next prime is 213111229. The reversal of 213111223 is 322111312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 213111223 - 2¹ = 213111221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213111197 and 213111206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213111221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78240 + ... + 80917.

It is an arithmetic number, because the mean of its divisors is an integer number (28966756).

Almost surely, 2^213111223 is an apocalyptic number.

213111223 is a deficient number, since it is larger than the sum of its proper divisors (18622825).

213111223 is a wasteful number, since it uses less digits than its factorization.

213111223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159273.

The product of its digits is 72, while the sum is 16.

The square root of 213111223 is about 14598.3294592224. The cubic root of 213111223 is about 597.3131928865.

Adding to 213111223 its reverse (322111312), we get a palindrome (535222535).

The spelling of 213111223 in words is "two hundred thirteen million, one hundred eleven thousand, two hundred twenty-three".