221641765535146 has 16 divisors (see below), whose sum is σ = 362687014404000. Its totient is φ = 100746121232880.

The previous prime is 221641765535123. The next prime is 221641765535249. The reversal of 221641765535146 is 641535567146122.

It is a super-2 number, since 2×221641765535146² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10924105 + ... + 23719603.

It is an arithmetic number, because the mean of its divisors is an integer number (22667938400250).

Almost surely, 2^{221641765535146} is an apocalyptic number.

221641765535146 is a deficient number, since it is larger than the sum of its proper divisors (141045248868854).

221641765535146 is a wasteful number, since it uses less digits than its factorization.

221641765535146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13582869.

The product of its digits is 36288000, while the sum is 58.

The spelling of 221641765535146 in words is "two hundred twenty-one trillion, six hundred forty-one billion, seven hundred sixty-five million, five hundred thirty-five thousand, one hundred forty-six".