213444222 has 16 divisors (see below), whose sum is σ = 431034240. Its totient is φ = 70457112.

The previous prime is 213444193. The next prime is 213444229. The reversal of 213444222 is 222444312.

It is a junction number, because it is equal to n+sod(n) for n = 213444192 and 213444201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213444229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172072 + ... + 173307.

It is an arithmetic number, because the mean of its divisors is an integer number (26939640).

Almost surely, 2^213444222 is an apocalyptic number.

213444222 is an abundant number, since it is smaller than the sum of its proper divisors (217590018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213444222 is a wasteful number, since it uses less digits than its factorization.

213444222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345487.

The product of its digits is 3072, while the sum is 24.

The square root of 213444222 is about 14609.7303876560. The cubic root of 213444222 is about 597.6241434828.

Adding to 213444222 its reverse (222444312), we get a palindrome (435888534).

The spelling of 213444222 in words is "two hundred thirteen million, four hundred forty-four thousand, two hundred twenty-two".