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BaseRepresentation
bin101000011110…
…1001100111010
31110221012101111
41100331030322
520413102302
62034510534
7345246211
oct120751472
943835344
1021222202
1110a85611
12713544a
134520821
142b66078
151ce30d7
hex143d33a

21222202 has 8 divisors (see below), whose sum is σ = 33508800. Its totient is φ = 10052604.

The previous prime is 21222181. The next prime is 21222211. The reversal of 21222202 is 20222212.

Adding to 21222202 its reverse (20222212), we get a palindrome (41444414).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 279202 + ... + 279277.

It is an arithmetic number, because the mean of its divisors is an integer number (4188600).

Almost surely, 221222202 is an apocalyptic number.

21222202 is a deficient number, since it is larger than the sum of its proper divisors (12286598).

21222202 is a wasteful number, since it uses less digits than its factorization.

21222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558500.

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

The square root of 21222202 is about 4606.7561255183. The cubic root of 21222202 is about 276.8620825502.

The spelling of 21222202 in words is "twenty-one million, two hundred twenty-two thousand, two hundred two".

Divisors: 1 2 19 38 558479 1116958 10611101 21222202