243203253 has 8 divisors (see below), whose sum is σ = 327482016. Its totient is φ = 160530000.

The previous prime is 243203209. The next prime is 243203281. The reversal of 243203253 is 352302342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243203253 - 2⁸ = 243202997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243203053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401023 + ... + 401628.

It is an arithmetic number, because the mean of its divisors is an integer number (40935252).

Almost surely, 2^243203253 is an apocalyptic number.

It is an amenable number.

243203253 is a deficient number, since it is larger than the sum of its proper divisors (84278763).

243203253 is a wasteful number, since it uses less digits than its factorization.

243203253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802755.

The product of its (nonzero) digits is 4320, while the sum is 24.

The square root of 243203253 is about 15594.9752484574. The cubic root of 243203253 is about 624.1990833170.

Adding to 243203253 its reverse (352302342), we get a palindrome (595505595).

The spelling of 243203253 in words is "two hundred forty-three million, two hundred three thousand, two hundred fifty-three".