220916 has 6 divisors (see below), whose sum is σ = 386610. Its totient is φ = 110456.

The previous prime is 220907. The next prime is 220919. The reversal of 220916 is 619022.

It can be written as a sum of positive squares in only one way, i.e., 220900 + 16 = 470^2 + 4^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 220916.

It is not an unprimeable number, because it can be changed into a prime (220919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27611 + ... + 27618.

It is an arithmetic number, because the mean of its divisors is an integer number (64435).

2²²⁰⁹¹⁶ is an apocalyptic number.

It is an amenable number.

220916 is a deficient number, since it is larger than the sum of its proper divisors (165694).

220916 is a wasteful number, since it uses less digits than its factorization.

220916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55233 (or 55231 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 220916 is about 470.0170209684. The cubic root of 220916 is about 60.4517749704.

Adding to 220916 its reverse (619022), we get a palindrome (839938).

It can be divided in two parts, 2209 and 16, that multiplied together give a square (35344 = 188²).

The spelling of 220916 in words is "two hundred twenty thousand, nine hundred sixteen".