231242211 has 12 divisors (see below), whose sum is σ = 353664792. Its totient is φ = 145093056.

The previous prime is 231242191. The next prime is 231242239. The reversal of 231242211 is 112242132.

It is a happy number.

231242211 is a `hidden beast` number, since 231 + 2 + 422 + 11 = 666.

It is not a de Polignac number, because 231242211 - 2²⁷ = 97024483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231242111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 755541 + ... + 755846.

It is an arithmetic number, because the mean of its divisors is an integer number (29472066).

Almost surely, 2^231242211 is an apocalyptic number.

231242211 is a deficient number, since it is larger than the sum of its proper divisors (122422581).

231242211 is a wasteful number, since it uses less digits than its factorization.

231242211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511410 (or 1511407 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 231242211 is about 15206.6502228466. The cubic root of 231242211 is about 613.7936216426.

Adding to 231242211 its reverse (112242132), we get a palindrome (343484343).

The spelling of 231242211 in words is "two hundred thirty-one million, two hundred forty-two thousand, two hundred eleven".