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206319141 = 32737611451
BaseRepresentation
bin11000100110000…
…10111000100101
3112101020002122200
430103002320211
5410304203031
632250045113
75053453350
oct1423027045
9471202580
10206319141
11a6509696
1259119799
133398a642
141d589297
15131a68e6
hexc4c2e25

206319141 has 48 divisors (see below), whose sum is σ = 355774848. Its totient is φ = 112752000.

The previous prime is 206319109. The next prime is 206319149. The reversal of 206319141 is 141913602.

206319141 is a `hidden beast` number, since 20 + 631 + 9 + 1 + 4 + 1 = 666.

206319141 is a nontrivial binomial coefficient, being equal to C(20314, 2).

It is not a de Polignac number, because 206319141 - 25 = 206319109 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206319149) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 141466 + ... + 142916.

It is an arithmetic number, because the mean of its divisors is an integer number (7411976).

Almost surely, 2206319141 is an apocalyptic number.

206319141 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

206319141 is the 20313-rd triangular number and also the 10157-th hexagonal number.

It is an amenable number.

206319141 is a deficient number, since it is larger than the sum of its proper divisors (149455707).

206319141 is a wasteful number, since it uses less digits than its factorization.

206319141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562 (or 1559 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 206319141 is about 14363.8135952817. The cubic root of 206319141 is about 590.8988893136.

The spelling of 206319141 in words is "two hundred six million, three hundred nineteen thousand, one hundred forty-one".

Divisors: 1 3 7 9 21 37 61 63 111 183 259 333 427 549 777 1281 1451 2257 2331 3843 4353 6771 10157 13059 15799 20313 30471 47397 53687 88511 91413 142191 161061 265533 375809 483183 619577 796599 1127427 1858731 3274907 3382281 5576193 9824721 22924349 29474163 68773047 206319141