221601655052 has 12 divisors (see below), whose sum is σ = 388324843536. Its totient is φ = 110651699760.

The previous prime is 221601655043. The next prime is 221601655081. The reversal of 221601655052 is 250556106122.

221601655052 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 3 ways as a sum of consecutive naturals, for example, 37278599 + ... + 37284542.

It is an arithmetic number, because the mean of its divisors is an integer number (32360403628).

Almost surely, 2^221601655052 is an apocalyptic number.

It is an amenable number.

221601655052 is a deficient number, since it is larger than the sum of its proper divisors (166723188484).

221601655052 is a wasteful number, since it uses less digits than its factorization.

221601655052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74563888 (or 74563886 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 221601655052 in words is "two hundred twenty-one billion, six hundred one million, six hundred fifty-five thousand, fifty-two".