231323211 has 12 divisors (see below), whose sum is σ = 381866992. Its totient is φ = 132184656.

The previous prime is 231323201. The next prime is 231323219. The reversal of 231323211 is 112323132.

It is not a de Polignac number, because 231323211 - 2⁷ = 231323083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231323219) 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, 1835836 + ... + 1835961.

Almost surely, 2^231323211 is an apocalyptic number.

231323211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

231323211 is a deficient number, since it is larger than the sum of its proper divisors (150543781).

231323211 is a wasteful number, since it uses less digits than its factorization.

231323211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3671810 (or 3671807 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 231323211 is about 15209.3132981078. The cubic root of 231323211 is about 613.8652802428.

Adding to 231323211 its reverse (112323132), we get a palindrome (343646343).

The spelling of 231323211 in words is "two hundred thirty-one million, three hundred twenty-three thousand, two hundred eleven".