167218 has 4 divisors (see below), whose sum is σ = 250830. Its totient is φ = 83608.

The previous prime is 167213. The next prime is 167221. The reversal of 167218 is 812761.

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., 154449 + 12769 = 393^2 + 113^2 .

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 167192 and 167201.

It is not an unprimeable number, because it can be changed into a prime (167213) by changing a digit.

167218 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 as a sum of consecutive naturals, namely, 41803 + ... + 41806.

2¹⁶⁷²¹⁸ is an apocalyptic number.

167218 is a deficient number, since it is larger than the sum of its proper divisors (83612).

167218 is an equidigital number, since it uses as much as digits as its factorization.

167218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83611.

The product of its digits is 672, while the sum is 25.

The square root of 167218 is about 408.9229756323. The cubic root of 167218 is about 55.0927361107.

Adding to 167218 its reverse (812761), we get a palindrome (979979).

The spelling of 167218 in words is "one hundred sixty-seven thousand, two hundred eighteen".