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30452141 = 70143441
BaseRepresentation
bin111010000101…
…0100110101101
32010022010111002
41310022212231
530243432031
63004410045
7516560516
oct164124655
963263432
1030452141
111620a165
12a246925
136402a25
144089a0d
152a17ccb
hex1d0a9ad

30452141 has 4 divisors (see below), whose sum is σ = 30496284. Its totient is φ = 30408000.

The previous prime is 30452111. The next prime is 30452143. The reversal of 30452141 is 14125403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14125403 = 115312251.

It can be written as a sum of positive squares in 2 ways, for example, as 18748900 + 11703241 = 4330^2 + 3421^2 .

It is a cyclic number.

It is not a de Polignac number, because 30452141 - 26 = 30452077 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 (30452143) 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, 21020 + ... + 22421.

It is an arithmetic number, because the mean of its divisors is an integer number (7624071).

Almost surely, 230452141 is an apocalyptic number.

It is an amenable number.

30452141 is a deficient number, since it is larger than the sum of its proper divisors (44143).

30452141 is an equidigital number, since it uses as much as digits as its factorization.

30452141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44142.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 30452141 is about 5518.3458572293. The cubic root of 30452141 is about 312.2764814444.

Adding to 30452141 its reverse (14125403), we get a palindrome (44577544).

The spelling of 30452141 in words is "thirty million, four hundred fifty-two thousand, one hundred forty-one".

Divisors: 1 701 43441 30452141