2146465209 has 16 divisors (see below), whose sum is σ = 3315612032. Its totient is φ = 1209748608.

The previous prime is 2146465183. The next prime is 2146465213. The reversal of 2146465209 is 9025646412.

It is a happy number.

It is not a de Polignac number, because 2146465209 - 2⁵ = 2146465177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2146465109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 698554 + ... + 701619.

It is an arithmetic number, because the mean of its divisors is an integer number (207225752).

Almost surely, 2^2146465209 is an apocalyptic number.

It is an amenable number.

2146465209 is a deficient number, since it is larger than the sum of its proper divisors (1169146823).

2146465209 is a wasteful number, since it uses less digits than its factorization.

2146465209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400256.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 2146465209 is about 46329.9601661819. The cubic root of 2146465209 is about 1289.9551712082.

The spelling of 2146465209 in words is "two billion, one hundred forty-six million, four hundred sixty-five thousand, two hundred nine".