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257016108 = 22321418009
BaseRepresentation
bin11110101000111…
…00000100101100
3122220121202211010
433110130010230
51011244003413
641300425220
76240413046
oct1724340454
9586552733
10257016108
11122096008
12720a8210
134132b04b
14261c4a96
151786cdc3
hexf51c12c

257016108 has 12 divisors (see below), whose sum is σ = 599704280. Its totient is φ = 85672032.

The previous prime is 257016103. The next prime is 257016113. The reversal of 257016108 is 801610752.

It is an interprime number because it is at equal distance from previous prime (257016103) and next prime (257016113).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×2570161083 (a number of 26 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (257016101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10708993 + ... + 10709016.

Almost surely, 2257016108 is an apocalyptic number.

It is an amenable number.

257016108 is an abundant number, since it is smaller than the sum of its proper divisors (342688172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257016108 is a wasteful number, since it uses less digits than its factorization.

257016108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21418016 (or 21418014 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 257016108 is about 16031.7219287262. The cubic root of 257016108 is about 635.7994007605.

The spelling of 257016108 in words is "two hundred fifty-seven million, sixteen thousand, one hundred eight".

Divisors: 1 2 3 4 6 12 21418009 42836018 64254027 85672036 128508054 257016108