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201220212 = 22329619479
BaseRepresentation
bin10111111111001…
…10000001110100
3112000122001020110
423333212001310
5403003021322
631544503020
74662225564
oct1377460164
9460561213
10201220212
11a36467a6
125747aa70
13328c381b
141ca1cda4
15129eac0c
hexbfe6074

201220212 has 48 divisors (see below), whose sum is σ = 493718400. Its totient is φ = 63692160.

The previous prime is 201220199. The next prime is 201220223. The reversal of 201220212 is 212022102.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16489 + ... + 25967.

It is an arithmetic number, because the mean of its divisors is an integer number (10285800).

Almost surely, 2201220212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201220212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246859200).

201220212 is an abundant number, since it is smaller than the sum of its proper divisors (292498188).

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

201220212 is a wasteful number, since it uses less digits than its factorization.

201220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9576 (or 9574 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 201220212 is about 14185.2110312113. The cubic root of 201220212 is about 585.9904443067.

Adding to 201220212 its reverse (212022102), we get a palindrome (413242314).

The spelling of 201220212 in words is "two hundred one million, two hundred twenty thousand, two hundred twelve".

Divisors: 1 2 3 4 6 12 29 58 61 87 116 122 174 183 244 348 366 732 1769 3538 5307 7076 9479 10614 18958 21228 28437 37916 56874 113748 274891 549782 578219 824673 1099564 1156438 1649346 1734657 2312876 3298692 3469314 6938628 16768351 33536702 50305053 67073404 100610106 201220212