221741 has 8 divisors (see below), whose sum is σ = 245784. Its totient is φ = 198720.

The previous prime is 221737. The next prime is 221747. The reversal of 221741 is 147122.

221741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 23716 + 198025 = 154^2 + 445^2 .

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 221741 - 2² = 221737 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221747) 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, 251 + ... + 711.

It is an arithmetic number, because the mean of its divisors is an integer number (30723).

2²²¹⁷⁴¹ is an apocalyptic number.

It is an amenable number.

221741 is a deficient number, since it is larger than the sum of its proper divisors (24043).

221741 is a wasteful number, since it uses less digits than its factorization.

221741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511.

The product of its digits is 112, while the sum is 17.

The square root of 221741 is about 470.8938309216. The cubic root of 221741 is about 60.5269328893.

Adding to 221741 its reverse (147122), we get a palindrome (368863).

The spelling of 221741 in words is "two hundred twenty-one thousand, seven hundred forty-one", and thus it is an iban number.