2163353921 has 8 divisors (see below), whose sum is σ = 2291416200. Its totient is φ = 2035381248.

The previous prime is 2163353917. The next prime is 2163353923. The reversal of 2163353921 is 1293533612.

It can be written as a sum of positive squares in 4 ways, for example, as 800267521 + 1363086400 = 28289^2 + 36920^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2163353921 - 2² = 2163353917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2163353923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30965 + ... + 72701.

It is an arithmetic number, because the mean of its divisors is an integer number (286427025).

Almost surely, 2^2163353921 is an apocalyptic number.

It is an amenable number.

2163353921 is a deficient number, since it is larger than the sum of its proper divisors (128062279).

2163353921 is a wasteful number, since it uses less digits than its factorization.

2163353921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44803.

The product of its digits is 29160, while the sum is 35.

The square root of 2163353921 is about 46511.8686036156. The cubic root of 2163353921 is about 1293.3295239301.

The spelling of 2163353921 in words is "two billion, one hundred sixty-three million, three hundred fifty-three thousand, nine hundred twenty-one".