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27531009 = 34112532
BaseRepresentation
bin110100100000…
…1011100000001
31220210201110000
41221001130001
524021443014
62422030213
7453003222
oct151013401
956721400
1027531009
11145a4500
129278369
13591c24c
143929249
15263c509
hex1a41701

27531009 has 45 divisors (see below), whose sum is σ = 46074259. Its totient is φ = 16370640.

The previous prime is 27530999. The next prime is 27531013. The reversal of 27531009 is 90013572.

The square root of 27531009 is 5247.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 19847025 + 7683984 = 4455^2 + 2772^2 .

It is not a de Polignac number, because 27531009 - 223 = 19142401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (27531059) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 519427 + ... + 519479.

Almost surely, 227531009 is an apocalyptic number.

27531009 is the 5247-th square number.

27531009 is the 2624-th centered octagonal number.

It is an amenable number.

27531009 is a deficient number, since it is larger than the sum of its proper divisors (18543250).

27531009 is an equidigital number, since it uses as much as digits as its factorization.

27531009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The cubic root of 27531009 is about 301.9539460203.

The spelling of 27531009 in words is "twenty-seven million, five hundred thirty-one thousand, nine".

Divisors: 1 3 9 11 27 33 53 81 99 121 159 297 363 477 583 891 1089 1431 1749 2809 3267 4293 5247 6413 8427 9801 15741 19239 25281 30899 47223 57717 75843 92697 173151 227529 278091 339889 519453 834273 1019667 2502819 3059001 9177003 27531009