243040005225 has 24 divisors (see below), whose sum is σ = 446473492320. Its totient is φ = 129621335760.

The previous prime is 243040005211. The next prime is 243040005361. The reversal of 243040005225 is 522500040342.

It is a happy number.

243040005225 is a `hidden beast` number, since 2 + 4 + 30 + 400 + 0 + 5 + 225 = 666.

It is not a de Polignac number, because 243040005225 - 2⁴ = 243040005209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180028959 + ... + 180030308.

It is an arithmetic number, because the mean of its divisors is an integer number (18603062180).

Almost surely, 2^243040005225 is an apocalyptic number.

243040005225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243040005225 is a deficient number, since it is larger than the sum of its proper divisors (203433487095).

243040005225 is a wasteful number, since it uses less digits than its factorization.

243040005225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360059286 (or 360059275 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

Adding to 243040005225 its reverse (522500040342), we get a palindrome (765540045567).

The spelling of 243040005225 in words is "two hundred forty-three billion, forty million, five thousand, two hundred twenty-five".