53218 has 16 divisors (see below), whose sum is σ = 90720. Its totient is φ = 23200.

The previous prime is 53201. The next prime is 53231. The reversal of 53218 is 81235.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 53195 and 53204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 873 + ... + 931.

It is an arithmetic number, because the mean of its divisors is an integer number (5670).

2⁵³²¹⁸ is an apocalyptic number.

53218 is a deficient number, since it is larger than the sum of its proper divisors (37502).

53218 is a wasteful number, since it uses less digits than its factorization.

53218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113.

The product of its digits is 240, while the sum is 19.

The square root of 53218 is about 230.6902685420. The cubic root of 53218 is about 37.6142883677.

It can be divided in two parts, 5321 and 8, that added together give a square (5329 = 73²).

The spelling of 53218 in words is "fifty-three thousand, two hundred eighteen".