243245510243 has 4 divisors (see below), whose sum is σ = 249178327608. Its totient is φ = 237312692880.

The previous prime is 243245510239. The next prime is 243245510257. The reversal of 243245510243 is 342015542342.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 243245510243 - 2² = 243245510239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243245510203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2966408621 + ... + 2966408702.

It is an arithmetic number, because the mean of its divisors is an integer number (62294581902).

Almost surely, 2^243245510243 is an apocalyptic number.

243245510243 is a deficient number, since it is larger than the sum of its proper divisors (5932817365).

243245510243 is an equidigital number, since it uses as much as digits as its factorization.

243245510243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5932817364.

The product of its (nonzero) digits is 115200, while the sum is 35.

The spelling of 243245510243 in words is "two hundred forty-three billion, two hundred forty-five million, five hundred ten thousand, two hundred forty-three".