2113251609 has 16 divisors (see below), whose sum is σ = 3272984960. Its totient is φ = 1187775360.

The previous prime is 2113251607. The next prime is 2113251671. The reversal of 2113251609 is 9061523112.

It is not a de Polignac number, because 2113251609 - 2¹ = 2113251607 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2113251607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 823564 + ... + 826125.

It is an arithmetic number, because the mean of its divisors is an integer number (204561560).

Almost surely, 2^2113251609 is an apocalyptic number.

It is an amenable number.

2113251609 is a deficient number, since it is larger than the sum of its proper divisors (1159733351).

2113251609 is a wasteful number, since it uses less digits than its factorization.

2113251609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649760.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 2113251609 is about 45970.1164779904. The cubic root of 2113251609 is about 1283.2671275829.

The spelling of 2113251609 in words is "two billion, one hundred thirteen million, two hundred fifty-one thousand, six hundred nine".