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165000447 = 3221418563
BaseRepresentation
bin10011101010110…
…11010011111111
3102111110220001200
421311123103333
5314220003242
624212310543
74042323603
oct1165332377
9374426050
10165000447
1185158307
1247312453
1328251801
1417cb1503
15e74404c
hex9d5b4ff

165000447 has 12 divisors (see below), whose sum is σ = 238473144. Its totient is φ = 109936080.

The previous prime is 165000439. The next prime is 165000457. The reversal of 165000447 is 744000561.

165000447 is a `hidden beast` number, since 1 + 650 + 0 + 0 + 4 + 4 + 7 = 666.

It is not a de Polignac number, because 165000447 - 23 = 165000439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165000447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165000457) 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 11 ways as a sum of consecutive naturals, for example, 14988 + ... + 23550.

It is an arithmetic number, because the mean of its divisors is an integer number (19872762).

Almost surely, 2165000447 is an apocalyptic number.

165000447 is the 6423-rd decagonal number.

165000447 is a deficient number, since it is larger than the sum of its proper divisors (73472697).

165000447 is a wasteful number, since it uses less digits than its factorization.

165000447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10710 (or 10707 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 165000447 is about 12845.2499781047. The cubic root of 165000447 is about 548.4811505375.

The spelling of 165000447 in words is "one hundred sixty-five million, four hundred forty-seven", and thus it is an aban number.

Divisors: 1 3 9 2141 6423 8563 19269 25689 77067 18333383 55000149 165000447