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220625 = 54353
BaseRepresentation
bin110101110111010001
3102012122022
4311313101
524030000
64421225
71606136
oct656721
9365568
10220625
11140839
12a7815
1379562
145a58d
1545585
hex35dd1

220625 has 10 divisors (see below), whose sum is σ = 276474. Its totient is φ = 176000.

The previous prime is 220613. The next prime is 220663. The reversal of 220625 is 526022.

Adding to 220625 its reverse (526022), we get a palindrome (746647).

It can be written as a sum of positive squares in 5 ways, for example, as 96721 + 123904 = 311^2 + 352^2 .

It is not a de Polignac number, because 220625 - 28 = 220369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 220625.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 449 + ... + 801.

2220625 is an apocalyptic number.

220625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

220625 is a deficient number, since it is larger than the sum of its proper divisors (55849).

220625 is an frugal number, since it uses more digits than its factorization.

220625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 220625 is about 469.7073557014. The cubic root of 220625 is about 60.4252200864.

The spelling of 220625 in words is "two hundred twenty thousand, six hundred twenty-five".

Divisors: 1 5 25 125 353 625 1765 8825 44125 220625