2188163021 has 8 divisors (see below), whose sum is σ = 2396378304. Its totient is φ = 1981496320.

The previous prime is 2188162981. The next prime is 2188163027. The reversal of 2188163021 is 1203618812.

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 2188163021 - 2²⁶ = 2121054157 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 (2188163027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384185 + ... + 389838.

It is an arithmetic number, because the mean of its divisors is an integer number (299547288).

Almost surely, 2^2188163021 is an apocalyptic number.

It is an amenable number.

2188163021 is a deficient number, since it is larger than the sum of its proper divisors (208215283).

2188163021 is a wasteful number, since it uses less digits than its factorization.

2188163021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774291.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 2188163021 is about 46777.8047903063. The cubic root of 2188163021 is about 1298.2546639338.

The spelling of 2188163021 in words is "two billion, one hundred eighty-eight million, one hundred sixty-three thousand, twenty-one".