2113265509 has 2 divisors, whose sum is σ = 2113265510. Its totient is φ = 2113265508.

The previous prime is 2113265489. The next prime is 2113265527. The reversal of 2113265509 is 9055623112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1668477409 + 444788100 = 40847^2 + 21090^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113265509 - 2⁵ = 2113265477 is a prime.

It is a super-2 number, since 2×2113265509² = 8931782223058058162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2113265549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056632754 + 1056632755.

It is an arithmetic number, because the mean of its divisors is an integer number (1056632755).

Almost surely, 2^2113265509 is an apocalyptic number.

It is an amenable number.

2113265509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113265509 is an equidigital number, since it uses as much as digits as its factorization.

2113265509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 2113265509 is about 45970.2676629145. The cubic root of 2113265509 is about 1283.2699411576.

The spelling of 2113265509 in words is "two billion, one hundred thirteen million, two hundred sixty-five thousand, five hundred nine".