243402440357 has 4 divisors (see below), whose sum is σ = 243408353580. Its totient is φ = 243396527136.

The previous prime is 243402440317. The next prime is 243402440363. The reversal of 243402440357 is 753044204342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64857318241 + 178545122116 = 254671^2 + 422546^2 .

It is a cyclic number.

It is not a de Polignac number, because 243402440357 - 2⁶ = 243402440293 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243402440357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243402440317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2894432 + ... + 2977337.

It is an arithmetic number, because the mean of its divisors is an integer number (60852088395).

Almost surely, 2^243402440357 is an apocalyptic number.

It is an amenable number.

243402440357 is a deficient number, since it is larger than the sum of its proper divisors (5913223).

243402440357 is an equidigital number, since it uses as much as digits as its factorization.

243402440357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5913222.

The product of its (nonzero) digits is 322560, while the sum is 38.

Adding to 243402440357 its reverse (753044204342), we get a palindrome (996446644699).

The spelling of 243402440357 in words is "two hundred forty-three billion, four hundred two million, four hundred forty thousand, three hundred fifty-seven".