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30101105 = 56020221
BaseRepresentation
bin111001011010…
…0111001110001
32002122021221202
41302310321301
530201213410
62553100545
7513566216
oct162647161
962567852
1030101105
1115a9a451
12a0b7755
13630c008
143dd7b0d
152998ca5
hex1cb4e71

30101105 has 4 divisors (see below), whose sum is σ = 36121332. Its totient is φ = 24080880.

The previous prime is 30101087. The next prime is 30101107. The reversal of 30101105 is 50110103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50110103 = 97516599.

It can be written as a sum of positive squares in 2 ways, for example, as 18696976 + 11404129 = 4324^2 + 3377^2 .

It is not a de Polignac number, because 30101105 - 26 = 30101041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30101107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3010106 + ... + 3010115.

It is an arithmetic number, because the mean of its divisors is an integer number (9030333).

Almost surely, 230101105 is an apocalyptic number.

It is an amenable number.

30101105 is a deficient number, since it is larger than the sum of its proper divisors (6020227).

30101105 is an equidigital number, since it uses as much as digits as its factorization.

30101105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6020226.

The product of its (nonzero) digits is 15, while the sum is 11.

The square root of 30101105 is about 5486.4473933503. The cubic root of 30101105 is about 311.0719222416.

Adding to 30101105 its reverse (50110103), we get a palindrome (80211208).

The spelling of 30101105 in words is "thirty million, one hundred one thousand, one hundred five".

Divisors: 1 5 6020221 30101105