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30112013 = 109276257
BaseRepresentation
bin111001011011…
…1100100001101
32002122211220202
41302313210031
530202041023
62553223245
7513643061
oct162674415
962584822
1030112013
1115aa7668
12a101b25
136313c79
143ddbaa1
15299c128
hex1cb790d

30112013 has 4 divisors (see below), whose sum is σ = 30388380. Its totient is φ = 29835648.

The previous prime is 30111971. The next prime is 30112051. The reversal of 30112013 is 31021103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26183689 + 3928324 = 5117^2 + 1982^2 .

It is a cyclic number.

It is not a de Polignac number, because 30112013 - 222 = 25917709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30111985 and 30112003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30112073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138020 + ... + 138237.

It is an arithmetic number, because the mean of its divisors is an integer number (7597095).

Almost surely, 230112013 is an apocalyptic number.

It is an amenable number.

30112013 is a deficient number, since it is larger than the sum of its proper divisors (276367).

30112013 is a wasteful number, since it uses less digits than its factorization.

30112013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276366.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 30112013 is about 5487.4413892086. The cubic root of 30112013 is about 311.1094929857.

Adding to 30112013 its reverse (31021103), we get a palindrome (61133116).

The spelling of 30112013 in words is "thirty million, one hundred twelve thousand, thirteen".

Divisors: 1 109 276257 30112013