2181711158 has 16 divisors (see below), whose sum is σ = 3570981120. Its totient is φ = 991434600.

The previous prime is 2181711143. The next prime is 2181711199. The reversal of 2181711158 is 8511171812.

It is a congruent number.

It is an unprimeable number.

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, 96983 + ... + 117341.

It is an arithmetic number, because the mean of its divisors is an integer number (223186320).

Almost surely, 2^2181711158 is an apocalyptic number.

2181711158 is a deficient number, since it is larger than the sum of its proper divisors (1389269962).

2181711158 is a wasteful number, since it uses less digits than its factorization.

2181711158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25243.

The product of its digits is 4480, while the sum is 35.

The square root of 2181711158 is about 46708.7910141121. The cubic root of 2181711158 is about 1296.9774271048.

The spelling of 2181711158 in words is "two billion, one hundred eighty-one million, seven hundred eleven thousand, one hundred fifty-eight".