211131233 has 4 divisors (see below), whose sum is σ = 211619268. Its totient is φ = 210643200.

The previous prime is 211131227. The next prime is 211131269. The reversal of 211131233 is 332131112.

211131233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88209664 + 122921569 = 9392^2 + 11087^2 .

It is a cyclic number.

It is not a de Polignac number, because 211131233 - 2⁶ = 211131169 is a prime.

It is a super-5 number, since 5×211131233⁵ (a number of 43 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211131203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243368 + ... + 244233.

It is an arithmetic number, because the mean of its divisors is an integer number (52904817).

Almost surely, 2^211131233 is an apocalyptic number.

It is an amenable number.

211131233 is a deficient number, since it is larger than the sum of its proper divisors (488035).

211131233 is an equidigital number, since it uses as much as digits as its factorization.

211131233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488034.

The product of its digits is 108, while the sum is 17.

The square root of 211131233 is about 14530.3555703224. The cubic root of 211131233 is about 595.4575798903.

Adding to 211131233 its reverse (332131112), we get a palindrome (543262345).

The spelling of 211131233 in words is "two hundred eleven million, one hundred thirty-one thousand, two hundred thirty-three".