258218 has 16 divisors (see below), whose sum is σ = 411264. Its totient is φ = 121440.

The previous prime is 258211. The next prime is 258233. The reversal of 258218 is 812852.

It is a Curzon number.

It is a zygodrome in base 4.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 258218.

It is not an unprimeable number, because it can be changed into a prime (258211) by changing a digit.

258218 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3821 + ... + 3887.

It is an arithmetic number, because the mean of its divisors is an integer number (25704).

2²⁵⁸²¹⁸ is an apocalyptic number.

258218 is a deficient number, since it is larger than the sum of its proper divisors (153046).

258218 is a wasteful number, since it uses less digits than its factorization.

258218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157.

The product of its digits is 1280, while the sum is 26.

The square root of 258218 is about 508.1515521968. The cubic root of 258218 is about 63.6788929064.

The spelling of 258218 in words is "two hundred fifty-eight thousand, two hundred eighteen".