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30517578125 = 515
BaseRepresentation
bin11100011010111111…
…010100100110001101
32220202211012121002022
4130122333110212031
51000000000000000
622004121335525
72130153063656
oct343277244615
986684177068
1030517578125
1111a40417151
125ab83375a5
132b54693148
14169709852d
15bd92b5585
hex71afd498d

30517578125 has 16 divisors (see below), whose sum is σ = 38146972656. Its totient is φ = 24414062500.

The previous prime is 30517578121. The next prime is 30517578167. The reversal of 30517578125 is 52187571503.

The cubic root of 30517578125 is 3125.

It is a perfect power (a cube, a 5-th power, a 15-th power), and thus also a powerful number.

It can be written as a sum of positive squares in 8 ways, for example, as 18703844644 + 11813733481 = 136762^2 + 108691^2 .

It is not a de Polignac number, because 30517578125 - 22 = 30517578121 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30517578121) 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, 6103515623 + ... + 6103515627.

It is an arithmetic number, because the mean of its divisors is an integer number (2384185791).

Almost surely, 230517578125 is an apocalyptic number.

It is an amenable number.

30517578125 is a deficient number, since it is larger than the sum of its proper divisors (7629394531).

30517578125 is an frugal number, since it uses more digits than its factorization.

30517578125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 5 counting only the distinct ones).

The product of its (nonzero) digits is 294000, while the sum is 44.

The spelling of 30517578125 in words is "thirty billion, five hundred seventeen million, five hundred seventy-eight thousand, one hundred twenty-five".

Divisors: 1 5 25 125 625 3125 15625 78125 390625 1953125 9765625 48828125 244140625 1220703125 6103515625 30517578125