2188721158 has 16 divisors (see below), whose sum is σ = 3536507520. Its totient is φ = 1009927296.

The previous prime is 2188721137. The next prime is 2188721167. The reversal of 2188721158 is 8511278812.

It is a super-3 number, since 3×2188721158³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 132798 + ... + 148366.

It is an arithmetic number, because the mean of its divisors is an integer number (221031720).

Almost surely, 2^2188721158 is an apocalyptic number.

2188721158 is a deficient number, since it is larger than the sum of its proper divisors (1347786362).

2188721158 is a wasteful number, since it uses less digits than its factorization.

2188721158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20991.

The product of its digits is 71680, while the sum is 43.

The square root of 2188721158 is about 46783.7702413989. The cubic root of 2188721158 is about 1298.3650369357.

The spelling of 2188721158 in words is "two billion, one hundred eighty-eight million, seven hundred twenty-one thousand, one hundred fifty-eight".