213230320133 has 4 divisors (see below), whose sum is σ = 213231252780. Its totient is φ = 213229387488.

The previous prime is 213230320123. The next prime is 213230320139. The reversal of 213230320133 is 331023032312.

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 94579006369 + 118651313764 = 307537^2 + 344458^2 .

It is a cyclic number.

It is not a de Polignac number, because 213230320133 - 2⁴ = 213230320117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213230320099 and 213230320108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213230320139) 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, 135641 + ... + 666977.

It is an arithmetic number, because the mean of its divisors is an integer number (53307813195).

Almost surely, 2^213230320133 is an apocalyptic number.

It is an amenable number.

213230320133 is a deficient number, since it is larger than the sum of its proper divisors (932647).

213230320133 is an equidigital number, since it uses as much as digits as its factorization.

213230320133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932646.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 213230320133 its reverse (331023032312), we get a palindrome (544253352445).

The spelling of 213230320133 in words is "two hundred thirteen billion, two hundred thirty million, three hundred twenty thousand, one hundred thirty-three".