243121231325 has 12 divisors (see below), whose sum is σ = 344537516640. Its totient is φ = 166711701360.

The previous prime is 243121231319. The next prime is 243121231333. The reversal of 243121231325 is 523132121342.

It is not a de Polignac number, because 243121231325 - 2⁶ = 243121231261 is a prime.

It is a super-2 number, since 2×243121231325² (a number of 24 digits) contains 22 as substring.

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, 694631915 + ... + 694632264.

It is an arithmetic number, because the mean of its divisors is an integer number (28711459720).

Almost surely, 2^243121231325 is an apocalyptic number.

243121231325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243121231325 is a deficient number, since it is larger than the sum of its proper divisors (101416285315).

243121231325 is a wasteful number, since it uses less digits than its factorization.

243121231325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1389264196 (or 1389264191 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

Adding to 243121231325 its reverse (523132121342), we get a palindrome (766253352667).

The spelling of 243121231325 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred thirty-one thousand, three hundred twenty-five".