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3030023221 = 4197231559
BaseRepresentation
bin1011010010011010…
…0111110000110101
321211011112010110021
42310212213300311
522201141220341
61220355525141
7135041525641
oct26446476065
97734463407
103030023221
111315407325
127068b97b1
13393996c64
1420a5bdc21
1512b0249d1
hexb49a7c35

3030023221 has 4 divisors (see below), whose sum is σ = 3037255200. Its totient is φ = 3022791244.

The previous prime is 3030023219. The next prime is 3030023231. The reversal of 3030023221 is 1223200303.

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.

It is a cyclic number.

It is not a de Polignac number, because 3030023221 - 21 = 3030023219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3030023195 and 3030023204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3030023231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3615361 + ... + 3616198.

It is an arithmetic number, because the mean of its divisors is an integer number (759313800).

Almost surely, 23030023221 is an apocalyptic number.

It is an amenable number.

3030023221 is a deficient number, since it is larger than the sum of its proper divisors (7231979).

3030023221 is an equidigital number, since it uses as much as digits as its factorization.

3030023221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7231978.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 3030023221 is about 55045.6467034406. The cubic root of 3030023221 is about 1447.0448288703.

Adding to 3030023221 its reverse (1223200303), we get a palindrome (4253223524).

The spelling of 3030023221 in words is "three billion, thirty million, twenty-three thousand, two hundred twenty-one".

Divisors: 1 419 7231559 3030023221