220499 has 4 divisors (see below), whose sum is σ = 221520. Its totient is φ = 219480.

The previous prime is 220471. The next prime is 220511. The reversal of 220499 is 994022.

220499 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 994022 = 2 ⋅497011.

It is a cyclic number.

It is not a de Polignac number, because 220499 - 2⁸ = 220243 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 220499.

It is not an unprimeable number, because it can be changed into a prime (220469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44 + ... + 665.

It is an arithmetic number, because the mean of its divisors is an integer number (55380).

2²²⁰⁴⁹⁹ is an apocalyptic number.

220499 is a deficient number, since it is larger than the sum of its proper divisors (1021).

220499 is an equidigital number, since it uses as much as digits as its factorization.

220499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 220499 is about 469.5732104795. The cubic root of 220499 is about 60.4137148512.

The spelling of 220499 in words is "two hundred twenty thousand, four hundred ninety-nine".