2650308021 has 6 divisors (see below), whose sum is σ = 3828222710. Its totient is φ = 1766872008.

The previous prime is 2650307987. The next prime is 2650308049. The reversal of 2650308021 is 1208030562.

2650308021 is a `hidden beast` number, since 2 + 650 + 3 + 0 + 8 + 0 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1898780625 + 751527396 = 43575^2 + 27414^2 .

It is not a de Polignac number, because 2650308021 - 2¹⁹ = 2649783733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2650308061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 147239326 + ... + 147239343.

Almost surely, 2^2650308021 is an apocalyptic number.

It is an amenable number.

2650308021 is a deficient number, since it is larger than the sum of its proper divisors (1177914689).

2650308021 is a wasteful number, since it uses less digits than its factorization.

2650308021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294478675 (or 294478672 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 2650308021 is about 51481.1423824297. The cubic root of 2650308021 is about 1383.8811176593.

Adding to 2650308021 its reverse (1208030562), we get a palindrome (3858338583).

The spelling of 2650308021 in words is "two billion, six hundred fifty million, three hundred eight thousand, twenty-one".