243250220605 has 32 divisors (see below), whose sum is σ = 339317164800. Its totient is φ = 163942766592.

The previous prime is 243250220533. The next prime is 243250220617. The reversal of 243250220605 is 506022052342.

It is a cyclic number.

It is not a de Polignac number, because 243250220605 - 2²¹ = 243248123453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21166701 + ... + 21178189.

It is an arithmetic number, because the mean of its divisors is an integer number (10603661400).

Almost surely, 2^243250220605 is an apocalyptic number.

It is an amenable number.

243250220605 is a deficient number, since it is larger than the sum of its proper divisors (96066944195).

243250220605 is a wasteful number, since it uses less digits than its factorization.

243250220605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21813.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 243250220605 its reverse (506022052342), we get a palindrome (749272272947).

The spelling of 243250220605 in words is "two hundred forty-three billion, two hundred fifty million, two hundred twenty thousand, six hundred five".