221541361 has 8 divisors (see below), whose sum is σ = 224369600. Its totient is φ = 218726352.

The previous prime is 221541347. The next prime is 221541367. The reversal of 221541361 is 163145122.

It is a happy number.

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 221541361 - 2²¹ = 219444209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221541367) 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, 32866 + ... + 39028.

It is an arithmetic number, because the mean of its divisors is an integer number (28046200).

Almost surely, 2^221541361 is an apocalyptic number.

It is an amenable number.

221541361 is a deficient number, since it is larger than the sum of its proper divisors (2828239).

221541361 is a wasteful number, since it uses less digits than its factorization.

221541361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6615.

The product of its digits is 1440, while the sum is 25.

The square root of 221541361 is about 14884.2655512457. The cubic root of 221541361 is about 605.0876279512.

Adding to 221541361 its reverse (163145122), we get a palindrome (384686483).

The spelling of 221541361 in words is "two hundred twenty-one million, five hundred forty-one thousand, three hundred sixty-one".