221601655067 has 16 divisors (see below), whose sum is σ = 240552254880. Its totient is φ = 202928544000.

The previous prime is 221601655043. The next prime is 221601655081. The reversal of 221601655067 is 760556106122.

It is not a de Polignac number, because 221601655067 - 2¹⁸ = 221601392923 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221601655567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 866567 + ... + 1092767.

It is an arithmetic number, because the mean of its divisors is an integer number (15034515930).

Almost surely, 2^221601655067 is an apocalyptic number.

221601655067 is a deficient number, since it is larger than the sum of its proper divisors (18950599813).

221601655067 is a wasteful number, since it uses less digits than its factorization.

221601655067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226814.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 221601655067 in words is "two hundred twenty-one billion, six hundred one million, six hundred fifty-five thousand, sixty-seven".