213223135213 has 16 divisors (see below), whose sum is σ = 236504327040. Its totient is φ = 190593748800.

The previous prime is 213223135117. The next prime is 213223135241. The reversal of 213223135213 is 312531322312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213223135213 is a prime.

It is a super-2 number, since 2×213223135213² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213223135253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1882143 + ... + 1992211.

It is an arithmetic number, because the mean of its divisors is an integer number (14781520440).

Almost surely, 2^213223135213 is an apocalyptic number.

It is an amenable number.

213223135213 is a deficient number, since it is larger than the sum of its proper divisors (23281191827).

213223135213 is a wasteful number, since it uses less digits than its factorization.

213223135213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113028.

The product of its digits is 6480, while the sum is 28.

Adding to 213223135213 its reverse (312531322312), we get a palindrome (525754457525).

The spelling of 213223135213 in words is "two hundred thirteen billion, two hundred twenty-three million, one hundred thirty-five thousand, two hundred thirteen".