243204100445 has 8 divisors (see below), whose sum is σ = 293055896760. Its totient is φ = 193755962880.

The previous prime is 243204100417. The next prime is 243204100471. The reversal of 243204100445 is 544001402342.

It can be written as a sum of positive squares in 4 ways, for example, as 115136026489 + 128068073956 = 339317^2 + 357866^2 .

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

It is not a de Polignac number, because 243204100445 - 2⁸ = 243204100189 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100913360 + ... + 100915769.

It is an arithmetic number, because the mean of its divisors is an integer number (36631987095).

Almost surely, 2^243204100445 is an apocalyptic number.

It is an amenable number.

243204100445 is a deficient number, since it is larger than the sum of its proper divisors (49851796315).

243204100445 is a wasteful number, since it uses less digits than its factorization.

243204100445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201829375.

The product of its (nonzero) digits is 15360, while the sum is 29.

Adding to 243204100445 its reverse (544001402342), we get a palindrome (787205502787).

The spelling of 243204100445 in words is "two hundred forty-three billion, two hundred four million, one hundred thousand, four hundred forty-five".