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BaseRepresentation
bin111001011011…
…1110101101011
32002122220110011
41302313311223
530202110011
62553232351
7513646246
oct162676553
962586404
1030113131
1115aa8494
12a1026b7
136314629
143ddc25d
15299c621
hex1cb7d6b

30113131 has 2 divisors, whose sum is σ = 30113132. Its totient is φ = 30113130.

The previous prime is 30113123. The next prime is 30113179. The reversal of 30113131 is 13131103.

Adding to 30113131 its reverse (13131103), we get a palindrome (43244234).

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (13131103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30113131 - 23 = 30113123 is a prime.

It is a super-2 number, since 2×301131312 = 1813601317246322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30113231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15056565 + 15056566.

It is an arithmetic number, because the mean of its divisors is an integer number (15056566).

Almost surely, 230113131 is an apocalyptic number.

30113131 is a deficient number, since it is larger than the sum of its proper divisors (1).

30113131 is an equidigital number, since it uses as much as digits as its factorization.

30113131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 30113131 is about 5487.5432572327. The cubic root of 30113131 is about 311.1133432332.

The spelling of 30113131 in words is "thirty million, one hundred thirteen thousand, one hundred thirty-one".