243331223125 has 20 divisors (see below), whose sum is σ = 305328572956. Its totient is φ = 193857120000.

The previous prime is 243331223123. The next prime is 243331223129. The reversal of 243331223125 is 521322133342.

It can be written as a sum of positive squares in 10 ways, for example, as 66287196369 + 177044026756 = 257463^2 + 420766^2 .

It is not a de Polignac number, because 243331223125 - 2¹ = 243331223123 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243331223123) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 657114 + ... + 958363.

Almost surely, 2^243331223125 is an apocalyptic number.

243331223125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243331223125 is a deficient number, since it is larger than the sum of its proper divisors (61997349831).

243331223125 is an equidigital number, since it uses as much as digits as its factorization.

243331223125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615738 (or 1615723 counting only the distinct ones).

The product of its digits is 25920, while the sum is 31.

Adding to 243331223125 its reverse (521322133342), we get a palindrome (764653356467).

The spelling of 243331223125 in words is "two hundred forty-three billion, three hundred thirty-one million, two hundred twenty-three thousand, one hundred twenty-five".