212245522 has 8 divisors (see below), whose sum is σ = 318591756. Its totient is φ = 106048272.

The previous prime is 212245513. The next prime is 212245543. The reversal of 212245522 is 225542212.

It can be written as a sum of positive squares in 2 ways, for example, as 142539721 + 69705801 = 11939^2 + 8349^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33613 + ... + 39424.

Almost surely, 2^212245522 is an apocalyptic number.

212245522 is a deficient number, since it is larger than the sum of its proper divisors (106346234).

212245522 is a wasteful number, since it uses less digits than its factorization.

212245522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74492.

The product of its digits is 3200, while the sum is 25.

The square root of 212245522 is about 14568.6485989607. The cubic root of 212245522 is about 596.5032927999.

Adding to 212245522 its reverse (225542212), we get a palindrome (437787734).

The spelling of 212245522 in words is "two hundred twelve million, two hundred forty-five thousand, five hundred twenty-two".