221750045641 has 4 divisors (see below), whose sum is σ = 221754020292. Its totient is φ = 221746070992.

The previous prime is 221750045623. The next prime is 221750045663. The reversal of 221750045641 is 146540057122.

221750045641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 125652525625 + 96097520016 = 354475^2 + 309996^2 .

It is a cyclic number.

It is not a de Polignac number, because 221750045641 - 2¹⁵ = 221750012873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221750045641.

It is not an unprimeable number, because it can be changed into a prime (221750045441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1902430 + ... + 2015623.

It is an arithmetic number, because the mean of its divisors is an integer number (55438505073).

Almost surely, 2^221750045641 is an apocalyptic number.

It is an amenable number.

221750045641 is a deficient number, since it is larger than the sum of its proper divisors (3974651).

221750045641 is an equidigital number, since it uses as much as digits as its factorization.

221750045641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974650.

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 221750045641 in words is "two hundred twenty-one billion, seven hundred fifty million, forty-five thousand, six hundred forty-one".