212205252 has 48 divisors (see below), whose sum is σ = 567770112. Its totient is φ = 60427680.

The previous prime is 212205247. The next prime is 212205293. The reversal of 212205252 is 252502212.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22063 + ... + 30185.

It is an arithmetic number, because the mean of its divisors is an integer number (11828544).

Almost surely, 2^212205252 is an apocalyptic number.

It is an amenable number.

212205252 is an abundant number, since it is smaller than the sum of its proper divisors (355564860).

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

212205252 is a wasteful number, since it uses less digits than its factorization.

212205252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8448 (or 8446 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 212205252 is about 14567.2664559965. The cubic root of 212205252 is about 596.4655649415.

Adding to 212205252 its reverse (252502212), we get a palindrome (464707464).

The spelling of 212205252 in words is "two hundred twelve million, two hundred five thousand, two hundred fifty-two".