243123454525 has 12 divisors (see below), whose sum is σ = 344540667232. Its totient is φ = 166713225840.

The previous prime is 243123454493. The next prime is 243123454589. The reversal of 243123454525 is 525454321342.

It is not a de Polignac number, because 243123454525 - 2⁵ = 243123454493 is a prime.

It is a Duffinian number.

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, 694638267 + ... + 694638616.

Almost surely, 2^243123454525 is an apocalyptic number.

243123454525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243123454525 is a deficient number, since it is larger than the sum of its proper divisors (101417212707).

243123454525 is a wasteful number, since it uses less digits than its factorization.

243123454525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389276900 (or 1389276895 counting only the distinct ones).

The product of its digits is 576000, while the sum is 40.

Adding to 243123454525 its reverse (525454321342), we get a palindrome (768577775867).

The spelling of 243123454525 in words is "two hundred forty-three billion, one hundred twenty-three million, four hundred fifty-four thousand, five hundred twenty-five".