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30143123 = 371395861
BaseRepresentation
bin111001011111…
…1001010010011
32002201102120222
41302333022103
530204034443
62554023255
7514132553
oct162771223
962642528
1030143123
1116018a7a
12a117b2b
13632518a
144009163
1529a6468
hex1cbf293

30143123 has 8 divisors (see below), whose sum is σ = 31185840. Its totient is φ = 29112480.

The previous prime is 30143119. The next prime is 30143137. The reversal of 30143123 is 32134103.

Adding to 30143123 its reverse (32134103), we get a palindrome (62277226).

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30143123 - 22 = 30143119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30143153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2213 + ... + 8073.

It is an arithmetic number, because the mean of its divisors is an integer number (3898230).

Almost surely, 230143123 is an apocalyptic number.

30143123 is a deficient number, since it is larger than the sum of its proper divisors (1042717).

30143123 is a wasteful number, since it uses less digits than its factorization.

30143123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6037.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 30143123 is about 5490.2753118582. The cubic root of 30143123 is about 311.2165962550.

The spelling of 30143123 in words is "thirty million, one hundred forty-three thousand, one hundred twenty-three".

Divisors: 1 37 139 5143 5861 216857 814679 30143123