117243218 has 4 divisors (see below), whose sum is σ = 175864830. Its totient is φ = 58621608.

The previous prime is 117243211. The next prime is 117243251. The reversal of 117243218 is 812342711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 115713049 + 1530169 = 10757^2 + 1237^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (117243211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29310803 + ... + 29310806.

Almost surely, 2^117243218 is an apocalyptic number.

117243218 is a deficient number, since it is larger than the sum of its proper divisors (58621612).

117243218 is an equidigital number, since it uses as much as digits as its factorization.

117243218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58621611.

The product of its digits is 2688, while the sum is 29.

The square root of 117243218 is about 10827.8907456623. The cubic root of 117243218 is about 489.4359996915.

Adding to 117243218 its reverse (812342711), we get a palindrome (929585929).

The spelling of 117243218 in words is "one hundred seventeen million, two hundred forty-three thousand, two hundred eighteen".