221065252 has 24 divisors (see below), whose sum is σ = 396942336. Its totient is φ = 107675328.

The previous prime is 221065249. The next prime is 221065253. The reversal of 221065252 is 252560122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221065253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39288 + ... + 44560.

It is an arithmetic number, because the mean of its divisors is an integer number (16539264).

Almost surely, 2^221065252 is an apocalyptic number.

It is an amenable number.

221065252 is a deficient number, since it is larger than the sum of its proper divisors (175877084).

221065252 is a wasteful number, since it uses less digits than its factorization.

221065252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5547 (or 5545 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 221065252 is about 14868.2632476023. The cubic root of 221065252 is about 604.6538575033.

The spelling of 221065252 in words is "two hundred twenty-one million, sixty-five thousand, two hundred fifty-two".