231433220113 has 2 divisors, whose sum is σ = 231433220114. Its totient is φ = 231433220112.

The previous prime is 231433220111. The next prime is 231433220119. The reversal of 231433220113 is 311022334132.

231433220113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 226607417089 + 4825803024 = 476033^2 + 69468^2 .

It is a cyclic number.

It is not a de Polignac number, because 231433220113 - 2¹ = 231433220111 is a prime.

It is a super-2 number, since 2×231433220113² (a number of 24 digits) contains 22 as substring.

Together with 231433220111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (231433220111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115716610056 + 115716610057.

It is an arithmetic number, because the mean of its divisors is an integer number (115716610057).

Almost surely, 2^231433220113 is an apocalyptic number.

It is an amenable number.

231433220113 is a deficient number, since it is larger than the sum of its proper divisors (1).

231433220113 is an equidigital number, since it uses as much as digits as its factorization.

231433220113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 231433220113 its reverse (311022334132), we get a palindrome (542455554245).

The spelling of 231433220113 in words is "two hundred thirty-one billion, four hundred thirty-three million, two hundred twenty thousand, one hundred thirteen".