220138 has 4 divisors (see below), whose sum is σ = 330210. Its totient is φ = 110068.

The previous prime is 220123. The next prime is 220141. The reversal of 220138 is 831022.

It is a happy number.

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., 178929 + 41209 = 423^2 + 203^2 .

It is an Ulam number.

It is an unprimeable number.

220138 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, 55033 + ... + 55036.

2²²⁰¹³⁸ is an apocalyptic number.

220138 is a deficient number, since it is larger than the sum of its proper divisors (110072).

220138 is a wasteful number, since it uses less digits than its factorization.

220138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110071.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 220138 is about 469.1886614146. The cubic root of 220138 is about 60.3807271521.

It can be divided in two parts, 2201 and 38, that multiplied together give a palindrome (83638).

The spelling of 220138 in words is "two hundred twenty thousand, one hundred thirty-eight".