2193481688 has 8 divisors (see below), whose sum is σ = 4112778180. Its totient is φ = 1096740840.

The previous prime is 2193481669. The next prime is 2193481699. The reversal of 2193481688 is 8861843912.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2193481688² = 9622723831182658688, which contains 22 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 (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137092598 + ... + 137092613.

Almost surely, 2^2193481688 is an apocalyptic number.

It is an amenable number.

2193481688 is a deficient number, since it is larger than the sum of its proper divisors (1919296492).

2193481688 is a wasteful number, since it uses less digits than its factorization.

2193481688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274185217 (or 274185213 counting only the distinct ones).

The product of its digits is 663552, while the sum is 50.

The square root of 2193481688 is about 46834.6206133881. The cubic root of 2193481688 is about 1299.3056820972.

The spelling of 2193481688 in words is "two billion, one hundred ninety-three million, four hundred eighty-one thousand, six hundred eighty-eight".