221722041 has 8 divisors (see below), whose sum is σ = 313019424. Its totient is φ = 139119680.

The previous prime is 221722031. The next prime is 221722049. The reversal of 221722041 is 140227122.

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 221722041 - 2⁵ = 221722009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221721999 and 221722017.

It is not an unprimeable number, because it can be changed into a prime (221722049) by changing a digit.

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, 2173695 + ... + 2173796.

It is an arithmetic number, because the mean of its divisors is an integer number (39127428).

Almost surely, 2^221722041 is an apocalyptic number.

It is an amenable number.

221722041 is a deficient number, since it is larger than the sum of its proper divisors (91297383).

221722041 is a wasteful number, since it uses less digits than its factorization.

221722041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4347511.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 221722041 is about 14890.3338108989. Note that the first 3 decimals coincide. The cubic root of 221722041 is about 605.2520780937.

Adding to 221722041 its reverse (140227122), we get a palindrome (361949163).

The spelling of 221722041 in words is "two hundred twenty-one million, seven hundred twenty-two thousand, forty-one".