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22220212 = 2274011979
BaseRepresentation
bin101010011000…
…0110110110100
31112210220101211
41110300312310
521142021322
62112131204
7356603650
oct124606664
945726354
1022220212
11115a7413
127536b04
1347acb71
142d45a60
151e3db77
hex1530db4

22220212 has 24 divisors (see below), whose sum is σ = 44573760. Its totient is φ = 9494400.

The previous prime is 22220203. The next prime is 22220213. The reversal of 22220212 is 21202222.

It is a junction number, because it is equal to n+sod(n) for n = 22220192 and 22220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220213) 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, 10239 + ... + 12217.

It is an arithmetic number, because the mean of its divisors is an integer number (1857240).

Almost surely, 222220212 is an apocalyptic number.

It is an amenable number.

22220212 is an abundant number, since it is smaller than the sum of its proper divisors (22353548).

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

22220212 is a wasteful number, since it uses less digits than its factorization.

22220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391 (or 2389 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 22220212 is about 4713.8319868235. The cubic root of 22220212 is about 281.1357440762.

Adding to 22220212 its reverse (21202222), we get a palindrome (43422434).

The spelling of 22220212 in words is "twenty-two million, two hundred twenty thousand, two hundred twelve".

Divisors: 1 2 4 7 14 28 401 802 1604 1979 2807 3958 5614 7916 11228 13853 27706 55412 793579 1587158 3174316 5555053 11110106 22220212