213106222 has 16 divisors (see below), whose sum is σ = 365535072. Its totient is φ = 91278720.

The previous prime is 213106211. The next prime is 213106249. The reversal of 213106222 is 222601312.

It is a super-2 number, since 2×213106222² = 90828523710226568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213106222.

It is a congruent number.

It is an unprimeable number.

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, 30322 + ... + 36682.

It is an arithmetic number, because the mean of its divisors is an integer number (22845942).

Almost surely, 2^213106222 is an apocalyptic number.

213106222 is a deficient number, since it is larger than the sum of its proper divisors (152428850).

213106222 is a wasteful number, since it uses less digits than its factorization.

213106222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8763.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 213106222 is about 14598.1581714955. The cubic root of 213106222 is about 597.3085205428.

Adding to 213106222 its reverse (222601312), we get a palindrome (435707534).

The spelling of 213106222 in words is "two hundred thirteen million, one hundred six thousand, two hundred twenty-two".