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220020210 = 23252444669
BaseRepresentation
bin11010001110100…
…11110111110010
3120100000011222200
431013103313302
5422311121320
633455444030
75311066224
oct1507236762
9510004880
10220020210
11103217493
1261826616
1336776997
1421314414
15144b1290
hexd1d3df2

220020210 has 24 divisors (see below), whose sum is σ = 572052780. Its totient is φ = 58672032.

The previous prime is 220020191. The next prime is 220020217. The reversal of 220020210 is 12020022.

It can be written as a sum of positive squares in 2 ways, for example, as 196196049 + 23824161 = 14007^2 + 4881^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220020192 and 220020201.

It is not an unprimeable number, because it can be changed into a prime (220020217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1222245 + ... + 1222424.

Almost surely, 2220020210 is an apocalyptic number.

220020210 is an abundant number, since it is smaller than the sum of its proper divisors (352032570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220020210 is a wasteful number, since it uses less digits than its factorization.

220020210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444682 (or 2444679 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 220020210 is about 14833.0782375069. The cubic root of 220020210 is about 603.6995585600.

Adding to 220020210 its reverse (12020022), we get a palindrome (232040232).

The spelling of 220020210 in words is "two hundred twenty million, twenty thousand, two hundred ten".

Divisors: 1 2 3 5 6 9 10 15 18 30 45 90 2444669 4889338 7334007 12223345 14668014 22002021 24446690 36670035 44004042 73340070 110010105 220020210