221561482252 has 48 divisors (see below), whose sum is σ = 442249984512. Its totient is φ = 96139345280.

The previous prime is 221561482237. The next prime is 221561482271. The reversal of 221561482252 is 252284165122.

It is a happy number.

221561482252 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291408 + ... + 726664.

It is an arithmetic number, because the mean of its divisors is an integer number (9213541344).

Almost surely, 2^221561482252 is an apocalyptic number.

221561482252 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221561482252 is a deficient number, since it is larger than the sum of its proper divisors (220688502260).

221561482252 is a wasteful number, since it uses less digits than its factorization.

221561482252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435798 (or 435796 counting only the distinct ones).

The product of its digits is 153600, while the sum is 40.

The spelling of 221561482252 in words is "two hundred twenty-one billion, five hundred sixty-one million, four hundred eighty-two thousand, two hundred fifty-two".