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205192007 = 3110916067
BaseRepresentation
bin11000011101011…
…11101101000111
3112022002211111222
430032233231013
5410012121012
632205550555
75041050266
oct1416575507
9468084458
10205192007
11a5909879
125887545b
13336845b7
141d3745dd
1513032972
hexc3afb47

205192007 has 8 divisors (see below), whose sum is σ = 212040192. Its totient is φ = 198358200.

The previous prime is 205191971. The next prime is 205192033. The reversal of 205192007 is 700291502.

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 205192007 - 210 = 205190983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205192037) 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, 30788 + ... + 36854.

It is an arithmetic number, because the mean of its divisors is an integer number (26505024).

Almost surely, 2205192007 is an apocalyptic number.

205192007 is a deficient number, since it is larger than the sum of its proper divisors (6848185).

205192007 is a wasteful number, since it uses less digits than its factorization.

205192007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7189.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 205192007 is about 14324.5246692517. The cubic root of 205192007 is about 589.8208850142.

The spelling of 205192007 in words is "two hundred five million, one hundred ninety-two thousand, seven".

Divisors: 1 31 1091 6067 33821 188077 6619097 205192007