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200231291 = 1319810653
BaseRepresentation
bin10111110111101…
…00100101111011
3111221202210200202
423323310211323
5402224400131
631511352415
74650636461
oct1373644573
9457683622
10200231291
11a3030807
125708270b
1332638670
141c842831
15128a2bcb
hexbef497b

200231291 has 8 divisors (see below), whose sum is σ = 226983120. Its totient is φ = 175100832.

The previous prime is 200231281. The next prime is 200231293. The reversal of 200231291 is 192132002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-200231291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (200231293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405080 + ... + 405573.

It is an arithmetic number, because the mean of its divisors is an integer number (28372890).

Almost surely, 2200231291 is an apocalyptic number.

200231291 is a deficient number, since it is larger than the sum of its proper divisors (26751829).

200231291 is a wasteful number, since it uses less digits than its factorization.

200231291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810685.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 200231291 is about 14150.3106326328. The cubic root of 200231291 is about 585.0288937929.

Adding to 200231291 its reverse (192132002), we get a palindrome (392363293).

The spelling of 200231291 in words is "two hundred million, two hundred thirty-one thousand, two hundred ninety-one".

Divisors: 1 13 19 247 810653 10538489 15402407 200231291