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30075217 = 130123117
BaseRepresentation
bin111001010111…
…0100101010001
32002120222102221
41302232211101
530144401332
62552341041
7513430564
oct162564521
962528387
1030075217
1115a81a57
12a0a4781
1363002b3
143dcc4db
152991297
hex1cae951

30075217 has 4 divisors (see below), whose sum is σ = 30099636. Its totient is φ = 30050800.

The previous prime is 30075209. The next prime is 30075281. The reversal of 30075217 is 71257003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71257003 = 312298613.

It can be written as a sum of positive squares in 2 ways, for example, as 33856 + 30041361 = 184^2 + 5481^2 .

It is a cyclic number.

It is not a de Polignac number, because 30075217 - 23 = 30075209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30075191 and 30075200.

It is not an unprimeable number, because it can be changed into a prime (30075317) 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, 10258 + ... + 12859.

It is an arithmetic number, because the mean of its divisors is an integer number (7524909).

Almost surely, 230075217 is an apocalyptic number.

It is an amenable number.

30075217 is a deficient number, since it is larger than the sum of its proper divisors (24419).

30075217 is a wasteful number, since it uses less digits than its factorization.

30075217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24418.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 30075217 is about 5484.0876178267. The cubic root of 30075217 is about 310.9827190971.

The spelling of 30075217 in words is "thirty million, seventy-five thousand, two hundred seventeen".

Divisors: 1 1301 23117 30075217