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221300320424 = 23181152831713
BaseRepresentation
bin1100111000011010000…
…1101110100010101000
3210011012210121002000212
43032012201232202220
512111210340223144
6245355225520252
721663012454361
oct3160641564250
9704183532025
10221300320424
11859422971a7
1236a81043088
1317b3a214881
14a9d4d6cb68
155b5344549e
hex338686e8a8

221300320424 has 16 divisors (see below), whose sum is σ = 417230579220. Its totient is φ = 110038832640.

The previous prime is 221300320321. The next prime is 221300320427. The reversal of 221300320424 is 424023003122.

It can be written as a sum of positive squares in 2 ways, for example, as 198041020324 + 23259300100 = 445018^2 + 152510^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221300320424.

It is not an unprimeable number, because it can be changed into a prime (221300320427) 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, 76414409 + ... + 76417304.

Almost surely, 2221300320424 is an apocalyptic number.

It is an amenable number.

221300320424 is a deficient number, since it is larger than the sum of its proper divisors (195930258796).

221300320424 is a wasteful number, since it uses less digits than its factorization.

221300320424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152831900 (or 152831896 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 221300320424 its reverse (424023003122), we get a palindrome (645323323546).

The spelling of 221300320424 in words is "two hundred twenty-one billion, three hundred million, three hundred twenty thousand, four hundred twenty-four".

Divisors: 1 2 4 8 181 362 724 1448 152831713 305663426 611326852 1222653704 27662540053 55325080106 110650160212 221300320424