221605505232341 has 4 divisors (see below), whose sum is σ = 221611203389184. Its totient is φ = 221599807075500.

The previous prime is 221605505232323. The next prime is 221605505232383. The reversal of 221605505232341 is 143232505506122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221605505232341 - 2³⁸ = 221330627325397 is a prime.

It is a super-2 number, since 2×221605505232341² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221605505732341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2849020085 + ... + 2849097866.

It is an arithmetic number, because the mean of its divisors is an integer number (55402800847296).

Almost surely, 2^{221605505232341} is an apocalyptic number.

It is an amenable number.

221605505232341 is a deficient number, since it is larger than the sum of its proper divisors (5698156843).

221605505232341 is an equidigital number, since it uses as much as digits as its factorization.

221605505232341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5698156842.

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 221605505232341 in words is "two hundred twenty-one trillion, six hundred five billion, five hundred five million, two hundred thirty-two thousand, three hundred forty-one".