221375617 has 8 divisors (see below), whose sum is σ = 226281600. Its totient is φ = 216522384.

The previous prime is 221375603. The next prime is 221375629. The reversal of 221375617 is 716573122.

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 221375617 - 2¹¹ = 221373569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221375317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4642 + ... + 21547.

It is an arithmetic number, because the mean of its divisors is an integer number (28285200).

Almost surely, 2^221375617 is an apocalyptic number.

It is an amenable number.

221375617 is a deficient number, since it is larger than the sum of its proper divisors (4905983).

221375617 is a wasteful number, since it uses less digits than its factorization.

221375617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26375.

The product of its digits is 17640, while the sum is 34.

The square root of 221375617 is about 14878.6967507238. The cubic root of 221375617 is about 604.9366935102.

The spelling of 221375617 in words is "two hundred twenty-one million, three hundred seventy-five thousand, six hundred seventeen".