221533606552416 has 48 divisors (see below), whose sum is σ = 581537361941424. Its totient is φ = 73843056820224.

The previous prime is 221533606552369. The next prime is 221533606552439. The reversal of 221533606552416 is 614255606335122.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18280321 + ... + 27878976.

It is an arithmetic number, because the mean of its divisors is an integer number (12115361707113).

Almost surely, 2^{221533606552416} is an apocalyptic number.

It is an amenable number.

221533606552416 is an abundant number, since it is smaller than the sum of its proper divisors (360003755389008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221533606552416 is a wasteful number, since it uses less digits than its factorization.

221533606552416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46209303 (or 46209295 counting only the distinct ones).

The product of its (nonzero) digits is 7776000, while the sum is 51.

The spelling of 221533606552416 in words is "two hundred twenty-one trillion, five hundred thirty-three billion, six hundred six million, five hundred fifty-two thousand, four hundred sixteen".