2218182021 has 24 divisors (see below), whose sum is σ = 3511915680. Its totient is φ = 1337968800.

The previous prime is 2218181983. The next prime is 2218182053. The reversal of 2218182021 is 1202818122.

It is not a de Polignac number, because 2218182021 - 2¹⁰ = 2218180997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218182121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32206 + ... + 73983.

It is an arithmetic number, because the mean of its divisors is an integer number (146329820).

Almost surely, 2^2218182021 is an apocalyptic number.

It is an amenable number.

2218182021 is a deficient number, since it is larger than the sum of its proper divisors (1293733659).

2218182021 is a wasteful number, since it uses less digits than its factorization.

2218182021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106417 (or 106414 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 2218182021 is about 47097.5797785831. The cubic root of 2218182021 is about 1304.1645579790.

The spelling of 2218182021 in words is "two billion, two hundred eighteen million, one hundred eighty-two thousand, twenty-one".