213112233 has 6 divisors (see below), whose sum is σ = 307828794. Its totient is φ = 142074816.

The previous prime is 213112177. The next prime is 213112247. The reversal of 213112233 is 332211312.

It can be written as a sum of positive squares in only one way, i.e., 187224489 + 25887744 = 13683^2 + 5088^2 .

It is not a de Polignac number, because 213112233 - 2⁶ = 213112169 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213112283) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11839560 + ... + 11839577.

It is an arithmetic number, because the mean of its divisors is an integer number (51304799).

Almost surely, 2^213112233 is an apocalyptic number.

It is an amenable number.

213112233 is a deficient number, since it is larger than the sum of its proper divisors (94716561).

213112233 is a wasteful number, since it uses less digits than its factorization.

213112233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23679143 (or 23679140 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 213112233 is about 14598.3640521806. The cubic root of 213112233 is about 597.3141365024.

Adding to 213112233 its reverse (332211312), we get a palindrome (545323545).

The spelling of 213112233 in words is "two hundred thirteen million, one hundred twelve thousand, two hundred thirty-three".