218156 has 6 divisors (see below), whose sum is σ = 381780. Its totient is φ = 109076.

The previous prime is 218149. The next prime is 218171. The reversal of 218156 is 651812.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27266 + ... + 27273.

It is an arithmetic number, because the mean of its divisors is an integer number (63630).

2²¹⁸¹⁵⁶ is an apocalyptic number.

It is an amenable number.

218156 is a deficient number, since it is larger than the sum of its proper divisors (163624).

218156 is a wasteful number, since it uses less digits than its factorization.

218156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54543 (or 54541 counting only the distinct ones).

The product of its digits is 480, while the sum is 23.

The square root of 218156 is about 467.0717289668. The cubic root of 218156 is about 60.1989690886.

Adding to 218156 its reverse (651812), we get a palindrome (869968).

The spelling of 218156 in words is "two hundred eighteen thousand, one hundred fifty-six".