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30102011 = 172117491
BaseRepresentation
bin111001011010…
…1000111111011
32002122100012022
41302311013323
530201231021
62553105055
7513601652
oct162650773
962570168
1030102011
1115aa00a5
12a0b818b
13630c554
143dd8199
1529991ab
hex1cb51fb

30102011 has 4 divisors (see below), whose sum is σ = 30121224. Its totient is φ = 30082800.

The previous prime is 30101999. The next prime is 30102031. The reversal of 30102011 is 11020103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11020103 = 41268783.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-30102011 is a prime.

It is a super-2 number, since 2×301020112 = 1812262132488242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30102011.

It is not an unprimeable number, because it can be changed into a prime (30102031) 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, 7025 + ... + 10466.

It is an arithmetic number, because the mean of its divisors is an integer number (7530306).

Almost surely, 230102011 is an apocalyptic number.

30102011 is a deficient number, since it is larger than the sum of its proper divisors (19213).

30102011 is a wasteful number, since it uses less digits than its factorization.

30102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19212.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 30102011 is about 5486.5299598198. The cubic root of 30102011 is about 311.0750431496.

Adding to 30102011 its reverse (11020103), we get a palindrome (41122114).

The spelling of 30102011 in words is "thirty million, one hundred two thousand, eleven".

Divisors: 1 1721 17491 30102011