243241320405 has 64 divisors (see below), whose sum is σ = 416640630528. Its totient is φ = 120748953600.

The previous prime is 243241320331. The next prime is 243241320433. The reversal of 243241320405 is 504023142342.

It is not a de Polignac number, because 243241320405 - 2⁷ = 243241320277 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 24384999 + ... + 24394971.

It is an arithmetic number, because the mean of its divisors is an integer number (6510009852).

Almost surely, 2^243241320405 is an apocalyptic number.

It is an amenable number.

243241320405 is a deficient number, since it is larger than the sum of its proper divisors (173399310123).

243241320405 is a wasteful number, since it uses less digits than its factorization.

243241320405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11046.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 243241320405 its reverse (504023142342), we get a palindrome (747264462747).

The spelling of 243241320405 in words is "two hundred forty-three billion, two hundred forty-one million, three hundred twenty thousand, four hundred five".