243788253 has 8 divisors (see below), whose sum is σ = 325435488. Its totient is φ = 162333264.

The previous prime is 243788243. The next prime is 243788267. The reversal of 243788253 is 352887342.

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

It is not a de Polignac number, because 243788253 - 2⁶ = 243788189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243788213) 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, 45075 + ... + 50192.

It is an arithmetic number, because the mean of its divisors is an integer number (40679436).

Almost surely, 2^243788253 is an apocalyptic number.

It is an amenable number.

243788253 is a deficient number, since it is larger than the sum of its proper divisors (81647235).

243788253 is an equidigital number, since it uses as much as digits as its factorization.

243788253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96123.

The product of its digits is 322560, while the sum is 42.

The square root of 243788253 is about 15613.7200243888. The cubic root of 243788253 is about 624.6991644467.

The spelling of 243788253 in words is "two hundred forty-three million, seven hundred eighty-eight thousand, two hundred fifty-three".