243351321025 has 6 divisors (see below), whose sum is σ = 301755638102. Its totient is φ = 194681056800.

The previous prime is 243351321011. The next prime is 243351321053. The reversal of 243351321025 is 520123153342.

It can be written as a sum of positive squares in 3 ways, for example, as 18550167601 + 224801153424 = 136199^2 + 474132^2 .

It is a de Polignac number, because none of the positive numbers 2^k-243351321025 is a prime.

It is a super-2 number, since 2×243351321025² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4867026396 + ... + 4867026445.

Almost surely, 2^243351321025 is an apocalyptic number.

243351321025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243351321025 is a deficient number, since it is larger than the sum of its proper divisors (58404317077).

243351321025 is an equidigital number, since it uses as much as digits as its factorization.

243351321025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9734052851 (or 9734052846 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 243351321025 its reverse (520123153342), we get a palindrome (763474474367).

The spelling of 243351321025 in words is "two hundred forty-three billion, three hundred fifty-one million, three hundred twenty-one thousand, twenty-five".