243725386825 has 12 divisors (see below), whose sum is σ = 302729143068. Its totient is φ = 194651494400.

The previous prime is 243725386813. The next prime is 243725386831. The reversal of 243725386825 is 528683527342.

It can be written as a sum of positive squares in 6 ways, for example, as 593555769 + 243131831056 = 24363^2 + 493084^2 .

It is not a de Polignac number, because 243725386825 - 2²⁵ = 243691832393 is a prime.

It is a super-3 number, since 3×243725386825³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian 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, 8205256 + ... + 8234905.

It is an arithmetic number, because the mean of its divisors is an integer number (25227428589).

Almost surely, 2^243725386825 is an apocalyptic number.

243725386825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243725386825 is a deficient number, since it is larger than the sum of its proper divisors (59003756243).

243725386825 is a wasteful number, since it uses less digits than its factorization.

243725386825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16440764 (or 16440759 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 55.

The spelling of 243725386825 in words is "two hundred forty-three billion, seven hundred twenty-five million, three hundred eighty-six thousand, eight hundred twenty-five".