243520063 has 4 divisors (see below), whose sum is σ = 243573568. Its totient is φ = 243466560.

The previous prime is 243520049. The next prime is 243520073. The reversal of 243520063 is 360025342.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 243520063 - 2¹³ = 243511871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243520073) 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, 19218 + ... + 29263.

It is an arithmetic number, because the mean of its divisors is an integer number (60893392).

Almost surely, 2^243520063 is an apocalyptic number.

243520063 is a deficient number, since it is larger than the sum of its proper divisors (53505).

243520063 is an equidigital number, since it uses as much as digits as its factorization.

243520063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53504.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 243520063 is about 15605.1293810721. The cubic root of 243520063 is about 624.4700044546.

The spelling of 243520063 in words is "two hundred forty-three million, five hundred twenty thousand, sixty-three".