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2111513 is a prime number
BaseRepresentation
bin1000000011100000011001
310222021110012
420003200121
51020032023
6113131305
723643005
oct10034031
93867405
102111513
111212458
12859b35
1358c121
143cd705
152ba978
hex203819

2111513 has 2 divisors, whose sum is σ = 2111514. Its totient is φ = 2111512.

The previous prime is 2111509. The next prime is 2111531. The reversal of 2111513 is 3151112.

2111513 = 10272 + 10282.

Together with next prime (2111531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1056784 + 1054729 = 1028^2 + 1027^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111513 - 22 = 2111509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2111533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055756 + 1055757.

It is an arithmetic number, because the mean of its divisors is an integer number (1055757).

22111513 is an apocalyptic number.

2111513 is the 1028-th centered square number.

It is an amenable number.

2111513 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111513 is an equidigital number, since it uses as much as digits as its factorization.

2111513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30, while the sum is 14.

The square root of 2111513 is about 1453.1046073838. The cubic root of 2111513 is about 128.2915108937.

Adding to 2111513 its reverse (3151112), we get a palindrome (5262625).

The spelling of 2111513 in words is "two million, one hundred eleven thousand, five hundred thirteen".