213244320113 has 12 divisors (see below), whose sum is σ = 234407512500. Its totient is φ = 193846070880.

The previous prime is 213244320109. The next prime is 213244320143. The reversal of 213244320113 is 311023442312.

It can be written as a sum of positive squares in 2 ways, for example, as 183691959649 + 29552360464 = 428593^2 + 171908^2 .

It is not a de Polignac number, because 213244320113 - 2² = 213244320109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213244320143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2221631 + ... + 2315627.

It is an arithmetic number, because the mean of its divisors is an integer number (19533959375).

Almost surely, 2^213244320113 is an apocalyptic number.

It is an amenable number.

213244320113 is a deficient number, since it is larger than the sum of its proper divisors (21163192387).

213244320113 is a wasteful number, since it uses less digits than its factorization.

213244320113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112768 (or 112757 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 213244320113 its reverse (311023442312), we get a palindrome (524267762425).

The spelling of 213244320113 in words is "two hundred thirteen billion, two hundred forty-four million, three hundred twenty thousand, one hundred thirteen".