213215222 has 16 divisors (see below), whose sum is σ = 349138944. Its totient is φ = 96849000.

The previous prime is 213215183. The next prime is 213215243. The reversal of 213215222 is 222512312.

It is a junction number, because it is equal to n+sod(n) for n = 213215194 and 213215203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44147 + ... + 48737.

It is an arithmetic number, because the mean of its divisors is an integer number (21821184).

Almost surely, 2^213215222 is an apocalyptic number.

213215222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

213215222 is a deficient number, since it is larger than the sum of its proper divisors (135923722).

213215222 is a wasteful number, since it uses less digits than its factorization.

213215222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6715.

The product of its digits is 480, while the sum is 20.

The square root of 213215222 is about 14601.8910419165. The cubic root of 213215222 is about 597.4103407071.

Adding to 213215222 its reverse (222512312), we get a palindrome (435727534).

The spelling of 213215222 in words is "two hundred thirteen million, two hundred fifteen thousand, two hundred twenty-two".