243252563 has 4 divisors (see below), whose sum is σ = 247842288. Its totient is φ = 238662840.

The previous prime is 243252557. The next prime is 243252593. The reversal of 243252563 is 365252342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243252563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243252523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2294783 + ... + 2294888.

It is an arithmetic number, because the mean of its divisors is an integer number (61960572).

Almost surely, 2^243252563 is an apocalyptic number.

243252563 is a deficient number, since it is larger than the sum of its proper divisors (4589725).

243252563 is an equidigital number, since it uses as much as digits as its factorization.

243252563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4589724.

The product of its digits is 43200, while the sum is 32.

The square root of 243252563 is about 15596.5561262735. The cubic root of 243252563 is about 624.2412663833.

The spelling of 243252563 in words is "two hundred forty-three million, two hundred fifty-two thousand, five hundred sixty-three".