213222113 has 4 divisors (see below), whose sum is σ = 229623828. Its totient is φ = 196820400.

The previous prime is 213222101. The next prime is 213222133. The reversal of 213222113 is 311222312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127418944 + 85803169 = 11288^2 + 9263^2 .

It is a cyclic number.

It is not a de Polignac number, because 213222113 - 2⁶ = 213222049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213222091 and 213222100.

It is not an unprimeable number, because it can be changed into a prime (213222133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8200838 + ... + 8200863.

It is an arithmetic number, because the mean of its divisors is an integer number (57405957).

Almost surely, 2^213222113 is an apocalyptic number.

It is an amenable number.

213222113 is a deficient number, since it is larger than the sum of its proper divisors (16401715).

213222113 is a wasteful number, since it uses less digits than its factorization.

213222113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16401714.

The product of its digits is 144, while the sum is 17.

The square root of 213222113 is about 14602.1270025979. The cubic root of 213222113 is about 597.4167766302.

Adding to 213222113 its reverse (311222312), we get a palindrome (524444425).

The spelling of 213222113 in words is "two hundred thirteen million, two hundred twenty-two thousand, one hundred thirteen".