318640223 has 8 divisors (see below), whose sum is σ = 349618896. Its totient is φ = 287996800.

The previous prime is 318640219. The next prime is 318640249. The reversal of 318640223 is 322046813.

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 318640223 - 2² = 318640219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318640123) 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, 81818 + ... + 85623.

It is an arithmetic number, because the mean of its divisors is an integer number (43702362).

Almost surely, 2^318640223 is an apocalyptic number.

318640223 is a deficient number, since it is larger than the sum of its proper divisors (30978673).

318640223 is a wasteful number, since it uses less digits than its factorization.

318640223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167625.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 318640223 is about 17850.4964356737. The cubic root of 318640223 is about 683.0201756568.

The spelling of 318640223 in words is "three hundred eighteen million, six hundred forty thousand, two hundred twenty-three".