221202452 has 6 divisors (see below), whose sum is σ = 387104298. Its totient is φ = 110601224.

The previous prime is 221202413. The next prime is 221202461. The reversal of 221202452 is 254202122.

It can be written as a sum of positive squares in only one way, i.e., 161696656 + 59505796 = 12716^2 + 7714^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27650303 + ... + 27650310.

It is an arithmetic number, because the mean of its divisors is an integer number (64517383).

Almost surely, 2^221202452 is an apocalyptic number.

It is an amenable number.

221202452 is a deficient number, since it is larger than the sum of its proper divisors (165901846).

221202452 is a wasteful number, since it uses less digits than its factorization.

221202452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55300617 (or 55300615 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 221202452 is about 14872.8763862274. The cubic root of 221202452 is about 604.7789206573.

Adding to 221202452 its reverse (254202122), we get a palindrome (475404574).

The spelling of 221202452 in words is "two hundred twenty-one million, two hundred two thousand, four hundred fifty-two".