53117218 has 16 divisors (see below), whose sum is σ = 99336384. Its totient is φ = 20694960.

The previous prime is 53117201. The next prime is 53117219. The reversal of 53117218 is 81271135.

It is not an unprimeable number, because it can be changed into a prime (53117219) 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, 172305 + ... + 172612.

It is an arithmetic number, because the mean of its divisors is an integer number (6208524).

Almost surely, 2^53117218 is an apocalyptic number.

53117218 is a deficient number, since it is larger than the sum of its proper divisors (46219166).

53117218 is a wasteful number, since it uses less digits than its factorization.

53117218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344937.

The product of its digits is 1680, while the sum is 28.

The square root of 53117218 is about 7288.1560082095. The cubic root of 53117218 is about 375.9052924665.

It can be divided in two parts, 53117 and 218, that added together give a palindrome (53335).

The spelling of 53117218 in words is "fifty-three million, one hundred seventeen thousand, two hundred eighteen".