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30115 = 519317
BaseRepresentation
bin111010110100011
31112022101
413112203
51430430
6351231
7153541
oct72643
945271
1030115
1120698
1215517
1310927
14ad91
158dca
hex75a3

30115 has 8 divisors (see below), whose sum is σ = 38160. Its totient is φ = 22752.

The previous prime is 30113. The next prime is 30119. The reversal of 30115 is 51103.

Multipling 30115 by its product of nonzero digits (15), we get a triangular number (451725 = T950).

Adding to 30115 its reverse (51103), we get a palindrome (81218).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30115 - 21 = 30113 is a prime.

30115 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (30113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64 + ... + 253.

It is an arithmetic number, because the mean of its divisors is an integer number (4770).

230115 is an apocalyptic number.

30115 is a deficient number, since it is larger than the sum of its proper divisors (8045).

30115 is a wasteful number, since it uses less digits than its factorization.

30115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341.

The product of its (nonzero) digits is 15, while the sum is 10.

The square root of 30115 is about 173.5367396259. The cubic root of 30115 is about 31.1119779615. Note that the first 3 decimals are identical.

The spelling of 30115 in words is "thirty thousand, one hundred fifteen".

Divisors: 1 5 19 95 317 1585 6023 30115