221005171441 has 8 divisors (see below), whose sum is σ = 222156139968. Its totient is φ = 219856350000.

The previous prime is 221005171433. The next prime is 221005171459. The reversal of 221005171441 is 144171500122.

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

It is a cyclic number.

It is not a de Polignac number, because 221005171441 - 2³ = 221005171433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221005171411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330165 + ... + 742306.

It is an arithmetic number, because the mean of its divisors is an integer number (27769517496).

Almost surely, 2^221005171441 is an apocalyptic number.

It is an amenable number.

221005171441 is a deficient number, since it is larger than the sum of its proper divisors (1150968527).

221005171441 is a wasteful number, since it uses less digits than its factorization.

221005171441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073543.

The product of its (nonzero) digits is 2240, while the sum is 28.

Adding to 221005171441 its reverse (144171500122), we get a palindrome (365176671563).

The spelling of 221005171441 in words is "two hundred twenty-one billion, five million, one hundred seventy-one thousand, four hundred forty-one".