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57130129 = 721165921
BaseRepresentation
bin1101100111101…
…1110010010001
310222111111210201
43121323302101
5104111131004
65400255201
71262412100
oct331736221
9128444721
1057130129
112a280791
1217171501
13bab3914
147832037
1550376a4
hex367bc91

57130129 has 6 divisors (see below), whose sum is σ = 66457554. Its totient is φ = 48968640.

The previous prime is 57130103. The next prime is 57130133. The reversal of 57130129 is 92103175.

It can be written as a sum of positive squares in only one way, i.e., 46580625 + 10549504 = 6825^2 + 3248^2 .

It is not a de Polignac number, because 57130129 - 27 = 57130001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57130097 and 57130106.

It is not an unprimeable number, because it can be changed into a prime (57130429) 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, 582912 + ... + 583009.

It is an arithmetic number, because the mean of its divisors is an integer number (11076259).

Almost surely, 257130129 is an apocalyptic number.

It is an amenable number.

57130129 is a deficient number, since it is larger than the sum of its proper divisors (9327425).

57130129 is a wasteful number, since it uses less digits than its factorization.

57130129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1165935 (or 1165928 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 57130129 is about 7558.4475257820. The cubic root of 57130129 is about 385.1427569769.

The spelling of 57130129 in words is "fifty-seven million, one hundred thirty thousand, one hundred twenty-nine".

Divisors: 1 7 49 1165921 8161447 57130129