221505341 has 8 divisors (see below), whose sum is σ = 236512320. Its totient is φ = 206946432.

The previous prime is 221505289. The next prime is 221505343. The reversal of 221505341 is 143505122.

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 221505341 - 2²⁶ = 154396477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221505343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110996 + ... + 112973.

It is an arithmetic number, because the mean of its divisors is an integer number (29564040).

Almost surely, 2^221505341 is an apocalyptic number.

It is an amenable number.

221505341 is a deficient number, since it is larger than the sum of its proper divisors (15006979).

221505341 is a wasteful number, since it uses less digits than its factorization.

221505341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224035.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 221505341 is about 14883.0554994598. The cubic root of 221505341 is about 605.0548328145.

The spelling of 221505341 in words is "two hundred twenty-one million, five hundred five thousand, three hundred forty-one".