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30345041 = 32219421
BaseRepresentation
bin111001111000…
…0011101010001
32010002200120102
41303300131101
530232020131
63002222145
7515633336
oct163603521
963080512
1030345041
1116146751
12a1b4955
13639605c
14405c98d
1529e61cb
hex1cf0751

30345041 has 4 divisors (see below), whose sum is σ = 30357684. Its totient is φ = 30332400.

The previous prime is 30345023. The next prime is 30345061. The reversal of 30345041 is 14054303.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 16810000 + 13535041 = 4100^2 + 3679^2 .

It is a cyclic number.

It is not a de Polignac number, because 30345041 - 214 = 30328657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30345061) 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, 1490 + ... + 7931.

It is an arithmetic number, because the mean of its divisors is an integer number (7589421).

Almost surely, 230345041 is an apocalyptic number.

It is an amenable number.

30345041 is a deficient number, since it is larger than the sum of its proper divisors (12643).

30345041 is an equidigital number, since it uses as much as digits as its factorization.

30345041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12642.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 30345041 is about 5508.6333150792. The cubic root of 30345041 is about 311.9099599098.

Adding to 30345041 its reverse (14054303), we get a palindrome (44399344).

The spelling of 30345041 in words is "thirty million, three hundred forty-five thousand, forty-one".

Divisors: 1 3221 9421 30345041