243315516425 has 12 divisors (see below), whose sum is σ = 302070874560. Its totient is φ = 194420391120.

The previous prime is 243315516421. The next prime is 243315516439. The reversal of 243315516425 is 524615513342.

It is not a de Polignac number, because 243315516425 - 2² = 243315516421 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243315516421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5779157 + ... + 5821106.

It is an arithmetic number, because the mean of its divisors is an integer number (25172572880).

Almost surely, 2^243315516425 is an apocalyptic number.

243315516425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243315516425 is a deficient number, since it is larger than the sum of its proper divisors (58755358135).

243315516425 is a wasteful number, since it uses less digits than its factorization.

243315516425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11601112 (or 11601107 counting only the distinct ones).

The product of its digits is 432000, while the sum is 41.

The spelling of 243315516425 in words is "two hundred forty-three billion, three hundred fifteen million, five hundred sixteen thousand, four hundred twenty-five".