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30144141 = 323349349
BaseRepresentation
bin111001011111…
…1011010001101
32002201110222200
41302333122031
530204103031
62554032113
7514135536
oct162773215
962643880
1030144141
1116019815
12a118639
136325791
14400968d
1529a68e6
hex1cbf68d

30144141 has 6 divisors (see below), whose sum is σ = 43541550. Its totient is φ = 20096088.

The previous prime is 30144139. The next prime is 30144173. The reversal of 30144141 is 14144103.

It can be written as a sum of positive squares in only one way, i.e., 29387241 + 756900 = 5421^2 + 870^2 .

It is not a de Polignac number, because 30144141 - 21 = 30144139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30144131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1674666 + ... + 1674683.

It is an arithmetic number, because the mean of its divisors is an integer number (7256925).

Almost surely, 230144141 is an apocalyptic number.

It is an amenable number.

30144141 is a deficient number, since it is larger than the sum of its proper divisors (13397409).

30144141 is a wasteful number, since it uses less digits than its factorization.

30144141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3349355 (or 3349352 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 30144141 is about 5490.3680204518. The cubic root of 30144141 is about 311.2200997067.

Adding to 30144141 its reverse (14144103), we get a palindrome (44288244).

The spelling of 30144141 in words is "thirty million, one hundred forty-four thousand, one hundred forty-one".

Divisors: 1 3 9 3349349 10048047 30144141