243201 has 16 divisors (see below), whose sum is σ = 381824. Its totient is φ = 134784.

The previous prime is 243197. The next prime is 243203. The reversal of 243201 is 102342.

It is not a de Polignac number, because 243201 - 2² = 243197 is a prime.

It is a Duffinian number.

243201 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (243203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621 + ... + 933.

It is an arithmetic number, because the mean of its divisors is an integer number (23864).

It is a Proth number, since it is equal to 475 ⋅ 2⁹ + 1 and 475 < 2⁹.

2²⁴³²⁰¹ is an apocalyptic number.

243201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243201 is a deficient number, since it is larger than the sum of its proper divisors (138623).

243201 is a wasteful number, since it uses less digits than its factorization.

243201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 243201 is about 493.1541341204. The cubic root of 243201 is about 62.4197155814.

Adding to 243201 its reverse (102342), we get a palindrome (345543).

It can be divided in two parts, 243 and 201, that added together give a palindrome (444).

The spelling of 243201 in words is "two hundred forty-three thousand, two hundred one", and thus it is an iban number.