243320300225 has 12 divisors (see below), whose sum is σ = 302668971324. Its totient is φ = 194042176320.

The previous prime is 243320300207. The next prime is 243320300227. The reversal of 243320300225 is 522003023342.

It can be written as a sum of positive squares in 6 ways, for example, as 151979584 + 243168320641 = 12328^2 + 493121^2 .

It is not a de Polignac number, because 243320300225 - 2²⁰ = 243319251649 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243320300194 and 243320300203.

It is not an unprimeable number, because it can be changed into a prime (243320300227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15343514 + ... + 15359363.

It is an arithmetic number, because the mean of its divisors is an integer number (25222414277).

Almost surely, 2^243320300225 is an apocalyptic number.

243320300225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243320300225 is a deficient number, since it is larger than the sum of its proper divisors (59348671099).

243320300225 is a wasteful number, since it uses less digits than its factorization.

243320300225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30703204 (or 30703199 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 26.

Adding to 243320300225 its reverse (522003023342), we get a palindrome (765323323567).

The spelling of 243320300225 in words is "two hundred forty-three billion, three hundred twenty million, three hundred thousand, two hundred twenty-five".