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53017857 = 325890873
BaseRepresentation
bin1100101000111…
…1110100000001
310200202120211100
43022033310001
5102033032412
65132205013
71212434004
oct312176401
9120676740
1053017857
1127a22112
1215909769
13aca3c19
14708153b
1549c3edc
hex328fd01

53017857 has 6 divisors (see below), whose sum is σ = 76581362. Its totient is φ = 35345232.

The previous prime is 53017841. The next prime is 53017871. The reversal of 53017857 is 75871035.

53017857 is a `hidden beast` number, since 530 + 1 + 78 + 57 = 666.

It can be written as a sum of positive squares in only one way, i.e., 39992976 + 13024881 = 6324^2 + 3609^2 .

It is not a de Polignac number, because 53017857 - 24 = 53017841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53017807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2945428 + ... + 2945445.

Almost surely, 253017857 is an apocalyptic number.

It is an amenable number.

53017857 is a deficient number, since it is larger than the sum of its proper divisors (23563505).

53017857 is a wasteful number, since it uses less digits than its factorization.

53017857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5890879 (or 5890876 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 53017857 is about 7281.3362097901. The cubic root of 53017857 is about 375.6707568453.

The spelling of 53017857 in words is "fifty-three million, seventeen thousand, eight hundred fifty-seven".

Divisors: 1 3 9 5890873 17672619 53017857