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BaseRepresentation
bin110101110001000001
3102012002111
4311301001
524021400
64415321
71605025
oct656101
9365074
10220225
11140505
12a7541
1379315
145a385
15453ba
hex35c41

220225 has 12 divisors (see below), whose sum is σ = 285696. Its totient is φ = 168080.

The previous prime is 220217. The next prime is 220243. The reversal of 220225 is 522022.

It is not a de Polignac number, because 220225 - 23 = 220217 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384 + ... + 766.

It is an arithmetic number, because the mean of its divisors is an integer number (23808).

2220225 is an apocalyptic number.

220225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220225 is a deficient number, since it is larger than the sum of its proper divisors (65471).

220225 is a wasteful number, since it uses less digits than its factorization.

220225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 220225 is about 469.2813654941. The cubic root of 220225 is about 60.3886803926.

Adding to 220225 its reverse (522022), we get a palindrome (742247).

The spelling of 220225 in words is "two hundred twenty thousand, two hundred twenty-five".