220743 has 6 divisors (see below), whose sum is σ = 318864. Its totient is φ = 147156.

The previous prime is 220721. The next prime is 220747. The reversal of 220743 is 347022.

It is a happy number.

It is not a de Polignac number, because 220743 - 2¹² = 216647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220747) 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 5 ways as a sum of consecutive naturals, for example, 12255 + ... + 12272.

It is an arithmetic number, because the mean of its divisors is an integer number (53144).

2²²⁰⁷⁴³ is an apocalyptic number.

220743 is a deficient number, since it is larger than the sum of its proper divisors (98121).

220743 is a wasteful number, since it uses less digits than its factorization.

220743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24533 (or 24530 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 220743 is about 469.8329490361. The cubic root of 220743 is about 60.4359908591.

Adding to 220743 its reverse (347022), we get a palindrome (567765).

The spelling of 220743 in words is "two hundred twenty thousand, seven hundred forty-three", and thus it is an iban number.