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206256427 = 13177971171
BaseRepresentation
bin11000100101100…
…11100100101011
3112101002220121221
430102303210223
5410300201202
632244442511
75053102456
oct1422634453
9471086557
10206256427
11a6476563
12590a9437
1333967c30
141d57049d
1513193037
hexc4b392b

206256427 has 16 divisors (see below), whose sum is σ = 235684512. Its totient is φ = 178813440.

The previous prime is 206256397. The next prime is 206256437. The reversal of 206256427 is 724652602.

206256427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 206256427 - 211 = 206254379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206256392 and 206256401.

It is not an unprimeable number, because it can be changed into a prime (206256437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175552 + ... + 176722.

It is an arithmetic number, because the mean of its divisors is an integer number (14730282).

Almost surely, 2206256427 is an apocalyptic number.

206256427 is a deficient number, since it is larger than the sum of its proper divisors (29428085).

206256427 is a wasteful number, since it uses less digits than its factorization.

206256427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 206256427 is about 14361.6303740209. The cubic root of 206256427 is about 590.8390121929.

The spelling of 206256427 in words is "two hundred six million, two hundred fifty-six thousand, four hundred twenty-seven".

Divisors: 1 13 17 221 797 1171 10361 13549 15223 19907 176137 258791 933287 12132731 15865879 206256427