213196918 has 24 divisors (see below), whose sum is σ = 352998216. Its totient is φ = 96565260.

The previous prime is 213196909. The next prime is 213196927. The reversal of 213196918 is 819691312.

It is an interprime number because it is at equal distance from previous prime (213196909) and next prime (213196927).

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 11 ways as a sum of consecutive naturals, for example, 753205 + ... + 753487.

It is an arithmetic number, because the mean of its divisors is an integer number (14708259).

Almost surely, 2^213196918 is an apocalyptic number.

213196918 is a deficient number, since it is larger than the sum of its proper divisors (139801298).

213196918 is an frugal number, since it uses more digits than its factorization.

213196918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601 (or 296 counting only the distinct ones).

The product of its digits is 23328, while the sum is 40.

The square root of 213196918 is about 14601.2642603303. The cubic root of 213196918 is about 597.3932448173.

The spelling of 213196918 in words is "two hundred thirteen million, one hundred ninety-six thousand, nine hundred eighteen".