243320345525 has 12 divisors (see below), whose sum is σ = 317597083200. Its totient is φ = 184411208880.

The previous prime is 243320345509. The next prime is 243320345531. The reversal of 243320345525 is 525543023342.

It is not a de Polignac number, because 243320345525 - 2⁴ = 243320345509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256126205 + ... + 256127154.

It is an arithmetic number, because the mean of its divisors is an integer number (26466423600).

Almost surely, 2^243320345525 is an apocalyptic number.

243320345525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243320345525 is a deficient number, since it is larger than the sum of its proper divisors (74276737675).

243320345525 is a wasteful number, since it uses less digits than its factorization.

243320345525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512253388 (or 512253383 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 38.

Adding to 243320345525 its reverse (525543023342), we get a palindrome (768863368867).

The spelling of 243320345525 in words is "two hundred forty-three billion, three hundred twenty million, three hundred forty-five thousand, five hundred twenty-five".