243429257 has 8 divisors (see below), whose sum is σ = 246892800. Its totient is φ = 239975424.

The previous prime is 243429227. The next prime is 243429269. The reversal of 243429257 is 752924342.

It is a happy number.

243429257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 243429257 - 2²⁰ = 242380681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243429257.

It is not an unprimeable number, because it can be changed into a prime (243429227) 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, 58748 + ... + 62754.

It is an arithmetic number, because the mean of its divisors is an integer number (30861600).

Almost surely, 2^243429257 is an apocalyptic number.

It is an amenable number.

243429257 is a deficient number, since it is larger than the sum of its proper divisors (3463543).

243429257 is an equidigital number, since it uses as much as digits as its factorization.

243429257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4855.

The product of its digits is 120960, while the sum is 38.

The square root of 243429257 is about 15602.2196177339. The cubic root of 243429257 is about 624.3923754326.

The spelling of 243429257 in words is "two hundred forty-three million, four hundred twenty-nine thousand, two hundred fifty-seven".