221544616750221 has 8 divisors (see below), whose sum is σ = 295413223857280. Its totient is φ = 147686210404992.

The previous prime is 221544616750201. The next prime is 221544616750313. The reversal of 221544616750221 is 122057616445122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221544616750221 - 2²³ = 221544608361613 is a prime.

It is a super-2 number, since 2×221544616750221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221544616750201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2550139780 + ... + 2550226653.

It is an arithmetic number, because the mean of its divisors is an integer number (36926652982160).

Almost surely, 2^{221544616750221} is an apocalyptic number.

It is an amenable number.

221544616750221 is a deficient number, since it is larger than the sum of its proper divisors (73868607107059).

221544616750221 is a wasteful number, since it uses less digits than its factorization.

221544616750221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100380915.

The product of its (nonzero) digits is 1612800, while the sum is 48.

The spelling of 221544616750221 in words is "two hundred twenty-one trillion, five hundred forty-four billion, six hundred sixteen million, seven hundred fifty thousand, two hundred twenty-one".