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221002103 = 735312157
BaseRepresentation
bin11010010110000…
…11100101110111
3120101212001220002
431023003211313
5423034031403
633532501515
75322326000
oct1513034567
9511761802
10221002103
11103828173
126201a89b
1336a2b89a
14214cc1a7
1514607188
hexd2c3977

221002103 has 16 divisors (see below), whose sum is σ = 262612800. Its totient is φ = 185840928.

The previous prime is 221002097. The next prime is 221002121. The reversal of 221002103 is 301200122.

Adding to 221002103 its reverse (301200122), we get a palindrome (522202225).

It is a happy number.

It is not a de Polignac number, because 221002103 - 24 = 221002087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221002153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12101 + ... + 24257.

It is an arithmetic number, because the mean of its divisors is an integer number (16413300).

Almost surely, 2221002103 is an apocalyptic number.

221002103 is a deficient number, since it is larger than the sum of its proper divisors (41610697).

221002103 is an equidigital number, since it uses as much as digits as its factorization.

221002103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12231 (or 12217 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 221002103 is about 14866.1394786945. The cubic root of 221002103 is about 604.5962773356.

The spelling of 221002103 in words is "two hundred twenty-one million, two thousand, one hundred three".

Divisors: 1 7 49 53 343 371 2597 12157 18179 85099 595693 644321 4169851 4510247 31571729 221002103