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30132231 = 323617159
BaseRepresentation
bin111001011110…
…0100000000111
32002200212122120
41302330200013
530203212411
62553501023
7514056033
oct162744007
962625576
1030132231
1116010878
12a111773
13632022c
1440051c3
1529a3106
hex1cbc807

30132231 has 16 divisors (see below), whose sum is σ = 42616320. Its totient is φ = 18897120.

The previous prime is 30132209. The next prime is 30132251. The reversal of 30132231 is 13223103.

It is not a de Polignac number, because 30132231 - 25 = 30132199 is a prime.

It is a super-2 number, since 2×301322312 = 1815902690074722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30132231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30132251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 630 + ... + 7788.

It is an arithmetic number, because the mean of its divisors is an integer number (2663520).

Almost surely, 230132231 is an apocalyptic number.

30132231 is a deficient number, since it is larger than the sum of its proper divisors (12484089).

30132231 is a wasteful number, since it uses less digits than its factorization.

30132231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7246.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 30132231 is about 5489.2832865503. The cubic root of 30132231 is about 311.1791064486.

Adding to 30132231 its reverse (13223103), we get a palindrome (43355334).

The spelling of 30132231 in words is "thirty million, one hundred thirty-two thousand, two hundred thirty-one".

Divisors: 1 3 23 61 69 183 1403 4209 7159 21477 164657 436699 493971 1310097 10044077 30132231