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204166139 = 8316315091
BaseRepresentation
bin11000010101101…
…01001111111011
3112020011201021212
430022311033323
5404231304024
632131553335
75026245362
oct1412651773
9466151255
10204166139
11a5279051
125845b84b
13333b5688
141d1887d9
1512dcda0e
hexc2b53fb

204166139 has 8 divisors (see below), whose sum is σ = 207907392. Its totient is φ = 200455560.

The previous prime is 204166133. The next prime is 204166159. The reversal of 204166139 is 931661402.

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

It is a cyclic number.

It is not a de Polignac number, because 204166139 - 28 = 204165883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204166133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5984 + ... + 21074.

It is an arithmetic number, because the mean of its divisors is an integer number (25988424).

Almost surely, 2204166139 is an apocalyptic number.

204166139 is a deficient number, since it is larger than the sum of its proper divisors (3741253).

204166139 is a wasteful number, since it uses less digits than its factorization.

204166139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15337.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 204166139 is about 14288.6717017363. The cubic root of 204166139 is about 588.8362957277.

The spelling of 204166139 in words is "two hundred four million, one hundred sixty-six thousand, one hundred thirty-nine".

Divisors: 1 83 163 13529 15091 1252553 2459833 204166139