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200312221 = 23137151421
BaseRepresentation
bin10111111000010…
…00010110011101
3111221220220201011
423330020112131
5402234442341
631513215221
74651424434
oct1374102635
9457826634
10200312221
11a308659a
1257101511
1332666455
141c86411b
15128bbb81
hexbf0859d

200312221 has 16 divisors (see below), whose sum is σ = 212444928. Its totient is φ = 188496000.

The previous prime is 200312213. The next prime is 200312279. The reversal of 200312221 is 122213002.

It is a cyclic number.

It is not a de Polignac number, because 200312221 - 23 = 200312213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200312621) 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, 475591 + ... + 476011.

It is an arithmetic number, because the mean of its divisors is an integer number (13277808).

Almost surely, 2200312221 is an apocalyptic number.

It is an amenable number.

200312221 is a deficient number, since it is larger than the sum of its proper divisors (12132707).

200312221 is a wasteful number, since it uses less digits than its factorization.

200312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 200312221 is about 14153.1699982725. The cubic root of 200312221 is about 585.1077026722.

Adding to 200312221 its reverse (122213002), we get a palindrome (322525223).

The spelling of 200312221 in words is "two hundred million, three hundred twelve thousand, two hundred twenty-one".

Divisors: 1 23 137 151 421 3151 3473 9683 20687 57677 63571 475801 1326571 1462133 8709227 200312221