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254013221 = 7117197479
BaseRepresentation
bin11110010001111…
…10111100100101
3122200222012122002
433020332330211
51010011410341
641112215045
76203035220
oct1710767445
9580865562
10254013221
11120424990
127109a485
13408192a7
1425a425b7
151747829b
hexf23ef25

254013221 has 32 divisors (see below), whose sum is σ = 325140480. Its totient is φ = 192729600.

The previous prime is 254013217. The next prime is 254013229. The reversal of 254013221 is 122310452.

It is not a de Polignac number, because 254013221 - 22 = 254013217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 254013193 and 254013202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254013229) 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 31 ways as a sum of consecutive naturals, for example, 530060 + ... + 530538.

It is an arithmetic number, because the mean of its divisors is an integer number (10160640).

Almost surely, 2254013221 is an apocalyptic number.

It is an amenable number.

254013221 is a deficient number, since it is larger than the sum of its proper divisors (71127259).

254013221 is a wasteful number, since it uses less digits than its factorization.

254013221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665.

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

The square root of 254013221 is about 15937.7922247719. The cubic root of 254013221 is about 633.3135409943.

Adding to 254013221 its reverse (122310452), we get a palindrome (376323673).

The spelling of 254013221 in words is "two hundred fifty-four million, thirteen thousand, two hundred twenty-one".

Divisors: 1 7 11 71 77 97 479 497 679 781 1067 3353 5269 5467 6887 7469 34009 36883 46463 48209 75757 238063 325241 374099 511093 530299 2618693 3298873 3577651 23092111 36287603 254013221