2253646021 has 16 divisors (see below), whose sum is σ = 2614559040. Its totient is φ = 1919796480.

The previous prime is 2253646013. The next prime is 2253646051. The reversal of 2253646021 is 1206463522.

It is a cyclic number.

It is not a de Polignac number, because 2253646021 - 2³ = 2253646013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2253646001) 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, 16510 + ... + 69136.

It is an arithmetic number, because the mean of its divisors is an integer number (163409940).

Almost surely, 2^2253646021 is an apocalyptic number.

It is an amenable number.

2253646021 is a deficient number, since it is larger than the sum of its proper divisors (360913019).

2253646021 is a wasteful number, since it uses less digits than its factorization.

2253646021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52884.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 2253646021 is about 47472.5817814873. The cubic root of 2253646021 is about 1311.0781135122.

The spelling of 2253646021 in words is "two billion, two hundred fifty-three million, six hundred forty-six thousand, twenty-one".