2191329118 has 32 divisors (see below), whose sum is σ = 3631990752. Its totient is φ = 991503040.

The previous prime is 2191329079. The next prime is 2191329139. The reversal of 2191329118 is 8119231912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 618480 + ... + 622012.

It is an arithmetic number, because the mean of its divisors is an integer number (113499711).

Almost surely, 2^2191329118 is an apocalyptic number.

2191329118 is a deficient number, since it is larger than the sum of its proper divisors (1440661634).

2191329118 is a wasteful number, since it uses less digits than its factorization.

2191329118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3801 (or 3779 counting only the distinct ones).

The product of its digits is 7776, while the sum is 37.

The square root of 2191329118 is about 46811.6344299150. The cubic root of 2191329118 is about 1298.8805190881.

The spelling of 2191329118 in words is "two billion, one hundred ninety-one million, three hundred twenty-nine thousand, one hundred eighteen".