211232231 has 8 divisors (see below), whose sum is σ = 243665280. Its totient is φ = 179363448.

The previous prime is 211232209. The next prime is 211232243. The reversal of 211232231 is 132232112.

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 211232231 - 2¹⁸ = 210970087 is a prime.

It is a super-2 number, since 2×211232231² = 89238110826474722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211232251) 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, 140261 + ... + 141758.

It is an arithmetic number, because the mean of its divisors is an integer number (30458160).

Almost surely, 2^211232231 is an apocalyptic number.

211232231 is a deficient number, since it is larger than the sum of its proper divisors (32433049).

211232231 is a wasteful number, since it uses less digits than its factorization.

211232231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282133.

The product of its digits is 144, while the sum is 17.

The square root of 211232231 is about 14533.8305687111. The cubic root of 211232231 is about 595.5525136380.

Adding to 211232231 its reverse (132232112), we get a palindrome (343464343).

It can be divided in two parts, 2112 and 32231, that added together give a palindrome (34343).

The spelling of 211232231 in words is "two hundred eleven million, two hundred thirty-two thousand, two hundred thirty-one".