221542554530000 has 200 divisors, whose sum is σ = 587715962565600. Its totient is φ = 80206025920000.

The previous prime is 221542554529981. The next prime is 221542554530029. The reversal of 221542554530000 is 35455245122.

It is a tau number, because it is divible by the number of its divisors (200).

It is a super-2 number, since 2×221542554530000² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 20533826 + ... + 29406174.

It is an arithmetic number, because the mean of its divisors is an integer number (2938579812828).

Almost surely, 2^{221542554530000} is an apocalyptic number.

221542554530000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221542554530000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293857981282800).

221542554530000 is an abundant number, since it is smaller than the sum of its proper divisors (366173408035600).

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

221542554530000 is a wasteful number, since it uses less digits than its factorization.

221542554530000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8872615 (or 8872594 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 38.

The spelling of 221542554530000 in words is "two hundred twenty-one trillion, five hundred forty-two billion, five hundred fifty-four million, five hundred thirty thousand".