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57130055 = 5192311021
BaseRepresentation
bin1101100111101…
…1110001000111
310222111111200222
43121323301013
5104111130210
65400254555
71262411633
oct331736107
9128444628
1057130055
112a280724
121717145b
13bab3888
147831dc3
155037655
hex367bc47

57130055 has 24 divisors (see below), whose sum is σ = 74761344. Its totient is φ = 41860800.

The previous prime is 57130009. The next prime is 57130103. The reversal of 57130055 is 55003175.

It is not a de Polignac number, because 57130055 - 216 = 57064519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55445 + ... + 56465.

It is an arithmetic number, because the mean of its divisors is an integer number (3115056).

Almost surely, 257130055 is an apocalyptic number.

57130055 is a deficient number, since it is larger than the sum of its proper divisors (17631289).

57130055 is a wasteful number, since it uses less digits than its factorization.

57130055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 2625, while the sum is 26.

The square root of 57130055 is about 7558.4426305953. The cubic root of 57130055 is about 385.1425906865.

The spelling of 57130055 in words is "fifty-seven million, one hundred thirty thousand, fifty-five".

Divisors: 1 5 19 31 95 155 361 589 1021 1805 2945 5105 11191 19399 31651 55955 96995 158255 368581 601369 1842905 3006845 11426011 57130055