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205132135 = 5137144449
BaseRepresentation
bin11000011101000…
…01000101100111
3112021222210101111
430032201011213
5410003212020
632204405451
75040410605
oct1416410547
9467883344
10205132135
11a587889a
1258846887
1333663280
141d35a875
151301ed5a
hexc3a1167

205132135 has 16 divisors (see below), whose sum is σ = 268833600. Its totient is φ = 149345280.

The previous prime is 205132129. The next prime is 205132159. The reversal of 205132135 is 531231502.

It is not a de Polignac number, because 205132135 - 27 = 205132007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17610 + ... + 26839.

It is an arithmetic number, because the mean of its divisors is an integer number (16802100).

Almost surely, 2205132135 is an apocalyptic number.

205132135 is a deficient number, since it is larger than the sum of its proper divisors (63701465).

205132135 is a wasteful number, since it uses less digits than its factorization.

205132135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44538.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 205132135 is about 14322.4346743143. The cubic root of 205132135 is about 589.7635124232.

Adding to 205132135 its reverse (531231502), we get a palindrome (736363637).

The spelling of 205132135 in words is "two hundred five million, one hundred thirty-two thousand, one hundred thirty-five".

Divisors: 1 5 13 65 71 355 923 4615 44449 222245 577837 2889185 3155879 15779395 41026427 205132135