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30112131 = 3719163463
BaseRepresentation
bin111001011011…
…1100110000011
32002122212002010
41302313212003
530202042011
62553224003
7513643320
oct162674603
962585063
1030112131
1115aa7765
12a102003
13631403a
143ddbb47
15299c1a6
hex1cb7983

30112131 has 32 divisors (see below), whose sum is σ = 48701440. Its totient is φ = 16166304.

The previous prime is 30112123. The next prime is 30112133. The reversal of 30112131 is 13121103.

Adding to 30112131 its reverse (13121103), we get a palindrome (43233234).

It is not a de Polignac number, because 30112131 - 23 = 30112123 is a prime.

It is a super-2 number, since 2×301121312 = 1813480866722322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30112133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64806 + ... + 65268.

It is an arithmetic number, because the mean of its divisors is an integer number (1521920).

Almost surely, 230112131 is an apocalyptic number.

30112131 is a deficient number, since it is larger than the sum of its proper divisors (18589309).

30112131 is a wasteful number, since it uses less digits than its factorization.

30112131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 30112131 is about 5487.4521410214. The cubic root of 30112131 is about 311.1098993670.

The spelling of 30112131 in words is "thirty million, one hundred twelve thousand, one hundred thirty-one".

Divisors: 1 3 7 19 21 57 133 163 399 463 489 1141 1389 3097 3241 3423 8797 9291 9723 21679 26391 61579 65037 75469 184737 226407 528283 1433911 1584849 4301733 10037377 30112131