243240501399 has 64 divisors (see below), whose sum is σ = 384438472704. Its totient is φ = 133923926016.

The previous prime is 243240501391. The next prime is 243240501403. The reversal of 243240501399 is 993105042342.

It is not a de Polignac number, because 243240501399 - 2³ = 243240501391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243240501399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243240501391) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 42723397 + ... + 42729089.

It is an arithmetic number, because the mean of its divisors is an integer number (6006851136).

Almost surely, 2^243240501399 is an apocalyptic number.

243240501399 is a deficient number, since it is larger than the sum of its proper divisors (141197971305).

243240501399 is a wasteful number, since it uses less digits than its factorization.

243240501399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6416.

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 243240501399 in words is "two hundred forty-three billion, two hundred forty million, five hundred one thousand, three hundred ninety-nine".