243552505 has 32 divisors (see below), whose sum is σ = 346187520. Its totient is φ = 161018880.

The previous prime is 243552493. The next prime is 243552509. The reversal of 243552505 is 505255342.

It is a happy number.

It is not a de Polignac number, because 243552505 - 2⁹ = 243551993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243552509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 126762 + ... + 128668.

It is an arithmetic number, because the mean of its divisors is an integer number (10818360).

Almost surely, 2^243552505 is an apocalyptic number.

It is an amenable number.

243552505 is a deficient number, since it is larger than the sum of its proper divisors (102635015).

243552505 is a wasteful number, since it uses less digits than its factorization.

243552505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049.

The product of its (nonzero) digits is 30000, while the sum is 31.

The square root of 243552505 is about 15606.1688123639. The cubic root of 243552505 is about 624.4977340744.

The spelling of 243552505 in words is "two hundred forty-three million, five hundred fifty-two thousand, five hundred five".