221547906952 has 16 divisors (see below), whose sum is σ = 415537111440. Its totient is φ = 110738010576.

The previous prime is 221547906947. The next prime is 221547907003. The reversal of 221547906952 is 259609745122.

It is a happy number.

221547906952 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221547906952.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 4466658 + ... + 4515985.

It is an arithmetic number, because the mean of its divisors is an integer number (25971069465).

Almost surely, 2^221547906952 is an apocalyptic number.

It is an amenable number.

221547906952 is a deficient number, since it is larger than the sum of its proper divisors (193989204488).

221547906952 is a wasteful number, since it uses less digits than its factorization.

221547906952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8985732 (or 8985728 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 221547906952 in words is "two hundred twenty-one billion, five hundred forty-seven million, nine hundred six thousand, nine hundred fifty-two".