221544246145 has 8 divisors (see below), whose sum is σ = 269597505600. Its totient is φ = 174739123440.

The previous prime is 221544246103. The next prime is 221544246169. The reversal of 221544246145 is 541642445122.

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

It is not a de Polignac number, because 221544246145 - 2¹⁹ = 221543721857 is a prime.

It is a super-2 number, since 2×221544246145² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221544246098 and 221544246107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312033795 + ... + 312034504.

It is an arithmetic number, because the mean of its divisors is an integer number (33699688200).

Almost surely, 2^221544246145 is an apocalyptic number.

It is an amenable number.

221544246145 is a deficient number, since it is larger than the sum of its proper divisors (48053259455).

221544246145 is an equidigital number, since it uses as much as digits as its factorization.

221544246145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624068375.

The product of its digits is 307200, while the sum is 40.

The spelling of 221544246145 in words is "two hundred twenty-one billion, five hundred forty-four million, two hundred forty-six thousand, one hundred forty-five".