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128483030221 = 7134332834917
BaseRepresentation
bin111011110101000101…
…1110111010011001101
3110021122012111012021221
41313222023313103031
54101113123431341
6135005125123341
712165633510640
oct1675213672315
9407565435257
10128483030221
114a5423592a7
1220a98859551
13c167820490
14630bc29a57
15351eab5ed1
hex1dea2f74cd

128483030221 has 16 divisors (see below), whose sum is σ = 161810475904. Its totient is φ = 99292785984.

The previous prime is 128483030213. The next prime is 128483030237. The reversal of 128483030221 is 122030384821.

It is a happy number.

It is not a de Polignac number, because 128483030221 - 23 = 128483030213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128483030281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16413546 + ... + 16421371.

It is an arithmetic number, because the mean of its divisors is an integer number (10113154744).

Almost surely, 2128483030221 is an apocalyptic number.

It is an amenable number.

128483030221 is a deficient number, since it is larger than the sum of its proper divisors (33327445683).

128483030221 is a wasteful number, since it uses less digits than its factorization.

128483030221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32834980.

The product of its (nonzero) digits is 18432, while the sum is 34.

The spelling of 128483030221 in words is "one hundred twenty-eight billion, four hundred eighty-three million, thirty thousand, two hundred twenty-one".

Divisors: 1 7 13 43 91 301 559 3913 32834917 229844419 426853921 1411901431 2987977447 9883310017 18354718603 128483030221