220156 has 12 divisors (see below), whose sum is σ = 402192. Its totient is φ = 105248.

The previous prime is 220151. The next prime is 220163. The reversal of 220156 is 651022.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220151) by changing a digit.

220156 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1105 + ... + 1288.

It is an arithmetic number, because the mean of its divisors is an integer number (33516).

2²²⁰¹⁵⁶ is an apocalyptic number.

It is an amenable number.

220156 is a deficient number, since it is larger than the sum of its proper divisors (182036).

220156 is a wasteful number, since it uses less digits than its factorization.

220156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2420 (or 2418 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 220156 is about 469.2078430717. The cubic root of 220156 is about 60.3823728221.

Adding to 220156 its reverse (651022), we get a palindrome (871178).

It can be divided in two parts, 2201 and 56, that multiplied together give a triangular number (123256 = T₄₉₆).

The spelling of 220156 in words is "two hundred twenty thousand, one hundred fifty-six".