193939216 has 20 divisors (see below), whose sum is σ = 376328592. Its totient is φ = 96822176.

The previous prime is 193939199. The next prime is 193939217. The reversal of 193939216 is 612939391.

It is a super-2 number, since 2×193939216² = 75224839005389312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (193939217) 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 3 ways as a sum of consecutive naturals, for example, 2055 + ... + 19801.

Almost surely, 2^193939216 is an apocalyptic number.

193939216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

193939216 is a deficient number, since it is larger than the sum of its proper divisors (182389376).

193939216 is a wasteful number, since it uses less digits than its factorization.

193939216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18438 (or 18432 counting only the distinct ones).

The product of its digits is 78732, while the sum is 43.

The square root of 193939216 is about 13926.2060878044. The cubic root of 193939216 is about 578.8355710682.

The spelling of 193939216 in words is "one hundred ninety-three million, nine hundred thirty-nine thousand, two hundred sixteen".