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30145535 = 572711733
BaseRepresentation
bin111001011111…
…1101111111111
32002201112220022
41302333233333
530204124120
62554042355
7514142600
oct162775777
962645808
1030145535
111601a872
12a1193bb
1363262c4
144009da7
1529a7025
hex1cbfbff

30145535 has 24 divisors (see below), whose sum is σ = 42698016. Its totient is φ = 20368320.

The previous prime is 30145483. The next prime is 30145561. The reversal of 30145535 is 53554103.

It is not a de Polignac number, because 30145535 - 216 = 30079999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16529 + ... + 18261.

It is an arithmetic number, because the mean of its divisors is an integer number (1779084).

Almost surely, 230145535 is an apocalyptic number.

30145535 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

30145535 is a deficient number, since it is larger than the sum of its proper divisors (12552481).

30145535 is a wasteful number, since it uses less digits than its factorization.

30145535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823 (or 1816 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 30145535 is about 5490.4949685798. The cubic root of 30145535 is about 311.2248970362.

Adding to 30145535 its reverse (53554103), we get a palindrome (83699638).

The spelling of 30145535 in words is "thirty million, one hundred forty-five thousand, five hundred thirty-five".

Divisors: 1 5 7 35 49 71 245 355 497 1733 2485 3479 8665 12131 17395 60655 84917 123043 424585 615215 861301 4306505 6029107 30145535