231430211 has 4 divisors (see below), whose sum is σ = 231463512. Its totient is φ = 231396912.

The previous prime is 231430189. The next prime is 231430219. The reversal of 231430211 is 112034132.

231430211 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 a de Polignac number, because none of the positive numbers 2^k-231430211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231430211.

It is not an unprimeable number, because it can be changed into a prime (231430219) 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, 1826 + ... + 21591.

It is an arithmetic number, because the mean of its divisors is an integer number (57865878).

Almost surely, 2^231430211 is an apocalyptic number.

231430211 is a deficient number, since it is larger than the sum of its proper divisors (33301).

231430211 is an equidigital number, since it uses as much as digits as its factorization.

231430211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33300.

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

The square root of 231430211 is about 15212.8304729922. The cubic root of 231430211 is about 613.9599147297.

Adding to 231430211 its reverse (112034132), we get a palindrome (343464343).

The spelling of 231430211 in words is "two hundred thirty-one million, four hundred thirty thousand, two hundred eleven".