2105513 has 2 divisors, whose sum is σ = 2105514. Its totient is φ = 2105512.

The previous prime is 2105507. The next prime is 2105549. The reversal of 2105513 is 3155012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1507984 + 597529 = 1228^2 + 773^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105513 - 2⁴ = 2105497 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2105491 and 2105500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2105503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052756 + 1052757.

It is an arithmetic number, because the mean of its divisors is an integer number (1052757).

2^2105513 is an apocalyptic number.

It is an amenable number.

2105513 is a deficient number, since it is larger than the sum of its proper divisors (1).

2105513 is an equidigital number, since it uses as much as digits as its factorization.

2105513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 2105513 is about 1451.0385935598. The cubic root of 2105513 is about 128.1698794197.

The spelling of 2105513 in words is "two million, one hundred five thousand, five hundred thirteen".