243311125 has 8 divisors (see below), whose sum is σ = 303652440. Its totient is φ = 194648800.

The previous prime is 243311111. The next prime is 243311129. The reversal of 243311125 is 521113342.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31259281 + 212051844 = 5591^2 + 14562^2 .

It is a de Polignac number, because none of the positive numbers 2^k-243311125 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243311096 and 243311105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243311129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 973120 + ... + 973369.

It is an arithmetic number, because the mean of its divisors is an integer number (37956555).

Almost surely, 2^243311125 is an apocalyptic number.

243311125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243311125 is a deficient number, since it is larger than the sum of its proper divisors (60341315).

243311125 is an equidigital number, since it uses as much as digits as its factorization.

243311125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946504 (or 1946494 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 243311125 is about 15598.4334149298. The cubic root of 243311125 is about 624.2913568234.

Adding to 243311125 its reverse (521113342), we get a palindrome (764424467).

The spelling of 243311125 in words is "two hundred forty-three million, three hundred eleven thousand, one hundred twenty-five".