243120351399 has 8 divisors (see below), whose sum is σ = 324414318960. Its totient is φ = 161953309056.

The previous prime is 243120351379. The next prime is 243120351421. The reversal of 243120351399 is 993153021342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243120351399 - 2¹² = 243120347303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243120351399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243120351319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31726834 + ... + 31734495.

It is an arithmetic number, because the mean of its divisors is an integer number (40551789870).

Almost surely, 2^243120351399 is an apocalyptic number.

243120351399 is a deficient number, since it is larger than the sum of its proper divisors (81293967561).

243120351399 is a wasteful number, since it uses less digits than its factorization.

243120351399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63462609.

The product of its (nonzero) digits is 174960, while the sum is 42.

The spelling of 243120351399 in words is "two hundred forty-three billion, one hundred twenty million, three hundred fifty-one thousand, three hundred ninety-nine".