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30122141 = 74303163
BaseRepresentation
bin111001011101…
…0000010011101
32002200100210212
41302322002131
530202402031
62553342205
7514014440
oct162720235
962610725
1030122141
1116004235
12a107965
13631876a
144001657
1529a012b
hex1cba09d

30122141 has 4 divisors (see below), whose sum is σ = 34425312. Its totient is φ = 25818972.

The previous prime is 30122137. The next prime is 30122153. The reversal of 30122141 is 14122103.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14122103 = 43328421.

It is a cyclic number.

It is not a de Polignac number, because 30122141 - 22 = 30122137 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 (30122101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2151575 + ... + 2151588.

It is an arithmetic number, because the mean of its divisors is an integer number (8606328).

Almost surely, 230122141 is an apocalyptic number.

It is an amenable number.

30122141 is a deficient number, since it is larger than the sum of its proper divisors (4303171).

30122141 is an equidigital number, since it uses as much as digits as its factorization.

30122141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4303170.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 30122141 is about 5488.3641460821. The cubic root of 30122141 is about 311.1443690306.

Adding to 30122141 its reverse (14122103), we get a palindrome (44244244).

The spelling of 30122141 in words is "thirty million, one hundred twenty-two thousand, one hundred forty-one".

Divisors: 1 7 4303163 30122141