212205221652 has 24 divisors (see below), whose sum is σ = 505680529536. Its totient is φ = 69230072128.

The previous prime is 212205221617. The next prime is 212205221677. The reversal of 212205221652 is 256122502212.

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, 188124633 + ... + 188125760.

It is an arithmetic number, because the mean of its divisors is an integer number (21070022064).

Almost surely, 2^212205221652 is an apocalyptic number.

It is an amenable number.

212205221652 is an abundant number, since it is smaller than the sum of its proper divisors (293475307884).

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

212205221652 is a wasteful number, since it uses less digits than its factorization.

212205221652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376250447 (or 376250445 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 212205221652 its reverse (256122502212), we get a palindrome (468327723864).

The spelling of 212205221652 in words is "two hundred twelve billion, two hundred five million, two hundred twenty-one thousand, six hundred fifty-two".