243545253 has 8 divisors (see below), whose sum is σ = 371116608. Its totient is φ = 139168704.

The previous prime is 243545243. The next prime is 243545293. The reversal of 243545253 is 352545342.

It is a happy number.

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

It is not a de Polignac number, because 243545253 - 2⁵ = 243545221 is a prime.

It is a super-3 number, since 3×243545253³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243545243) 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, 5798676 + ... + 5798717.

It is an arithmetic number, because the mean of its divisors is an integer number (46389576).

Almost surely, 2^243545253 is an apocalyptic number.

It is an amenable number.

243545253 is a deficient number, since it is larger than the sum of its proper divisors (127571355).

243545253 is a wasteful number, since it uses less digits than its factorization.

243545253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11597403.

The product of its digits is 72000, while the sum is 33.

The square root of 243545253 is about 15605.9364666142. The cubic root of 243545253 is about 624.4915356813.

The spelling of 243545253 in words is "two hundred forty-three million, five hundred forty-five thousand, two hundred fifty-three".