221442553252 has 6 divisors (see below), whose sum is σ = 387524468198. Its totient is φ = 110721276624.

The previous prime is 221442553181. The next prime is 221442553253. The reversal of 221442553252 is 252355244122.

It can be written as a sum of positive squares in only one way, i.e., 166548874816 + 54893678436 = 408104^2 + 234294^2 .

It is not an unprimeable number, because it can be changed into a prime (221442553253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27680319153 + ... + 27680319160.

Almost surely, 2^221442553252 is an apocalyptic number.

It is an amenable number.

221442553252 is a deficient number, since it is larger than the sum of its proper divisors (166081914946).

221442553252 is a wasteful number, since it uses less digits than its factorization.

221442553252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55360638317 (or 55360638315 counting only the distinct ones).

The product of its digits is 192000, while the sum is 37.

Adding to 221442553252 its reverse (252355244122), we get a palindrome (473797797374).

The spelling of 221442553252 in words is "two hundred twenty-one billion, four hundred forty-two million, five hundred fifty-three thousand, two hundred fifty-two".