243320402425 has 6 divisors (see below), whose sum is σ = 301717299038. Its totient is φ = 194656321920.

The previous prime is 243320402389. The next prime is 243320402447. The reversal of 243320402425 is 524204023342.

It can be written as a sum of positive squares in 3 ways, for example, as 3136441 + 243317265984 = 1771^2 + 493272^2 .

It is not a de Polignac number, because 243320402425 - 2²⁷ = 243186184697 is a prime.

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, 4866408024 + ... + 4866408073.

Almost surely, 2^243320402425 is an apocalyptic number.

243320402425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243320402425 is a deficient number, since it is larger than the sum of its proper divisors (58396896613).

243320402425 is an equidigital number, since it uses as much as digits as its factorization.

243320402425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9732816107 (or 9732816102 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 31.

Adding to 243320402425 its reverse (524204023342), we get a palindrome (767524425767).

The spelling of 243320402425 in words is "two hundred forty-three billion, three hundred twenty million, four hundred two thousand, four hundred twenty-five".