223640197 has 8 divisors (see below), whose sum is σ = 244256832. Its totient is φ = 203071200.

The previous prime is 223640143. The next prime is 223640227. The reversal of 223640197 is 791046322.

223640197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 223640197 - 2⁷ = 223640069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223640897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1704 + ... + 21217.

It is an arithmetic number, because the mean of its divisors is an integer number (30532104).

Almost surely, 2^223640197 is an apocalyptic number.

It is an amenable number.

223640197 is a deficient number, since it is larger than the sum of its proper divisors (20616635).

223640197 is a wasteful number, since it uses less digits than its factorization.

223640197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23819.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 223640197 is about 14954.6045417457. The cubic root of 223640197 is about 606.9924493360.

The spelling of 223640197 in words is "two hundred twenty-three million, six hundred forty thousand, one hundred ninety-seven".