213103131233 has 4 divisors (see below), whose sum is σ = 213104076180. Its totient is φ = 213102186288.

The previous prime is 213103131229. The next prime is 213103131247. The reversal of 213103131233 is 332131301312.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 165004939264 + 48098191969 = 406208^2 + 219313^2 .

It is a cyclic number.

It is not a de Polignac number, because 213103131233 - 2² = 213103131229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213103131199 and 213103131208.

It is not an unprimeable number, because it can be changed into a prime (213103131433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85283 + ... + 658391.

It is an arithmetic number, because the mean of its divisors is an integer number (53276019045).

Almost surely, 2^213103131233 is an apocalyptic number.

It is an amenable number.

213103131233 is a deficient number, since it is larger than the sum of its proper divisors (944947).

213103131233 is an equidigital number, since it uses as much as digits as its factorization.

213103131233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944946.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 213103131233 its reverse (332131301312), we get a palindrome (545234432545).

The spelling of 213103131233 in words is "two hundred thirteen billion, one hundred three million, one hundred thirty-one thousand, two hundred thirty-three".