243104257 has 16 divisors (see below), whose sum is σ = 271724544. Its totient is φ = 215602000.

The previous prime is 243104243. The next prime is 243104311. The reversal of 243104257 is 752401342.

It is a cyclic number.

It is not a de Polignac number, because 243104257 - 2¹⁹ = 242579969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243104237) 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, 222282 + ... + 223372.

It is an arithmetic number, because the mean of its divisors is an integer number (16982784).

Almost surely, 2^243104257 is an apocalyptic number.

It is an amenable number.

243104257 is a deficient number, since it is larger than the sum of its proper divisors (28620287).

243104257 is a wasteful number, since it uses less digits than its factorization.

243104257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 243104257 is about 15591.8009543478. The cubic root of 243104257 is about 624.1143783115.

Adding to 243104257 its reverse (752401342), we get a palindrome (995505599).

The spelling of 243104257 in words is "two hundred forty-three million, one hundred four thousand, two hundred fifty-seven".