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30143141 = 719132251
BaseRepresentation
bin111001011111…
…1001010100101
32002201102121122
41302333022211
530204040031
62554023325
7514132610
oct162771245
962642548
1030143141
1116018a96
12a117b45
1363251a2
144009177
1529a647b
hex1cbf2a5

30143141 has 8 divisors (see below), whose sum is σ = 34482624. Its totient is φ = 25812000.

The previous prime is 30143137. The next prime is 30143149. The reversal of 30143141 is 14134103.

Adding to 30143141 its reverse (14134103), we get a palindrome (44277244).

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 30143141 - 22 = 30143137 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30143149) 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, 12266 + ... + 14516.

It is an arithmetic number, because the mean of its divisors is an integer number (4310328).

Almost surely, 230143141 is an apocalyptic number.

It is an amenable number.

30143141 is a deficient number, since it is larger than the sum of its proper divisors (4339483).

30143141 is a wasteful number, since it uses less digits than its factorization.

30143141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 30143141 is about 5490.2769511200. The cubic root of 30143141 is about 311.2166582028.

The spelling of 30143141 in words is "thirty million, one hundred forty-three thousand, one hundred forty-one".

Divisors: 1 7 1913 2251 13391 15757 4306163 30143141