231253612211 has 4 divisors (see below), whose sum is σ = 231802908624. Its totient is φ = 230704315800.

The previous prime is 231253612189. The next prime is 231253612243. The reversal of 231253612211 is 112216352132.

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 231253612211 - 2³⁰ = 230179870387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231253612111) 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, 274647575 + ... + 274648416.

It is an arithmetic number, because the mean of its divisors is an integer number (57950727156).

Almost surely, 2^231253612211 is an apocalyptic number.

231253612211 is a deficient number, since it is larger than the sum of its proper divisors (549296413).

231253612211 is an equidigital number, since it uses as much as digits as its factorization.

231253612211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549296412.

The product of its digits is 4320, while the sum is 29.

Adding to 231253612211 its reverse (112216352132), we get a palindrome (343469964343).

The spelling of 231253612211 in words is "two hundred thirty-one billion, two hundred fifty-three million, six hundred twelve thousand, two hundred eleven".