211043231 has 4 divisors (see below), whose sum is σ = 241192272. Its totient is φ = 180894192.

The previous prime is 211043221. The next prime is 211043243. The reversal of 211043231 is 132340112.

211043231 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 is a cyclic number.

It is not a de Polignac number, because 211043231 - 2¹⁰ = 211042207 is a prime.

It is a super-2 number, since 2×211043231² = 89078490701838722, 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 (211043201) 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, 15074510 + ... + 15074523.

It is an arithmetic number, because the mean of its divisors is an integer number (60298068).

Almost surely, 2^211043231 is an apocalyptic number.

211043231 is a deficient number, since it is larger than the sum of its proper divisors (30149041).

211043231 is an equidigital number, since it uses as much as digits as its factorization.

211043231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30149040.

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

The square root of 211043231 is about 14527.3270425085. The cubic root of 211043231 is about 595.3748371346.

Adding to 211043231 its reverse (132340112), we get a palindrome (343383343).

The spelling of 211043231 in words is "two hundred eleven million, forty-three thousand, two hundred thirty-one".