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244221 = 3127641
BaseRepresentation
bin111011100111111101
3110102000020
4323213331
530303341
65122353
72035005
oct734775
9412006
10244221
1115753a
12b93b9
1387213
1465005
154c566
hex3b9fd

244221 has 8 divisors (see below), whose sum is σ = 328704. Its totient is φ = 161280.

The previous prime is 244219. The next prime is 244243. The reversal of 244221 is 122442.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 244221 - 21 = 244219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 244221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244261) 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, 61 + ... + 701.

It is an arithmetic number, because the mean of its divisors is an integer number (41088).

2244221 is an apocalyptic number.

It is an amenable number.

244221 is a deficient number, since it is larger than the sum of its proper divisors (84483).

244221 is a wasteful number, since it uses less digits than its factorization.

244221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771.

The product of its digits is 128, while the sum is 15.

The square root of 244221 is about 494.1872114897. The cubic root of 244221 is about 62.5068579141.

Adding to 244221 its reverse (122442), we get a palindrome (366663).

It can be divided in two parts, 244 and 221, that added together give a triangular number (465 = T30).

The spelling of 244221 in words is "two hundred forty-four thousand, two hundred twenty-one", and thus it is an iban number.

Divisors: 1 3 127 381 641 1923 81407 244221