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221041 = 474703
BaseRepresentation
bin110101111101110001
3102020012201
4311331301
524033131
64423201
71610302
oct657561
9366181
10221041
11141087
12a7b01
13797c2
145a7a9
1545761
hex35f71

221041 has 4 divisors (see below), whose sum is σ = 225792. Its totient is φ = 216292.

The previous prime is 221021. The next prime is 221047. The reversal of 221041 is 140122.

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, and also an emirpimes, since its reverse is a distinct semiprime: 140122 = 270061.

It is a cyclic number.

It is not a de Polignac number, because 221041 - 29 = 220529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221047) 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, 2305 + ... + 2398.

It is an arithmetic number, because the mean of its divisors is an integer number (56448).

2221041 is an apocalyptic number.

It is an amenable number.

221041 is a deficient number, since it is larger than the sum of its proper divisors (4751).

221041 is an equidigital number, since it uses as much as digits as its factorization.

221041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4750.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 221041 is about 470.1499760715. The cubic root of 221041 is about 60.4631745478.

Adding to 221041 its reverse (140122), we get a palindrome (361163).

The spelling of 221041 in words is "two hundred twenty-one thousand, forty-one", and thus it is an iban number.

Divisors: 1 47 4703 221041