231330400211 has 4 divisors (see below), whose sum is σ = 231684658752. Its totient is φ = 230976141672.

The previous prime is 231330400187. The next prime is 231330400229. The reversal of 231330400211 is 112004033132.

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 231330400211 - 2²² = 231326205907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231330400241) 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, 177128291 + ... + 177129596.

It is an arithmetic number, because the mean of its divisors is an integer number (57921164688).

Almost surely, 2^231330400211 is an apocalyptic number.

231330400211 is a deficient number, since it is larger than the sum of its proper divisors (354258541).

231330400211 is an equidigital number, since it uses as much as digits as its factorization.

231330400211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354258540.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 231330400211 its reverse (112004033132), we get a palindrome (343334433343).

The spelling of 231330400211 in words is "two hundred thirty-one billion, three hundred thirty million, four hundred thousand, two hundred eleven".