243855225453 has 16 divisors (see below), whose sum is σ = 381631859840. Its totient is φ = 135579738816.

The previous prime is 243855225451. The next prime is 243855225487. The reversal of 243855225453 is 354522558342.

It is a happy number.

It is not a de Polignac number, because 243855225453 - 2¹ = 243855225451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243855225451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156920218 + ... + 156921771.

It is an arithmetic number, because the mean of its divisors is an integer number (23851991240).

Almost surely, 2^243855225453 is an apocalyptic number.

It is an amenable number.

243855225453 is a deficient number, since it is larger than the sum of its proper divisors (137776634387).

243855225453 is a wasteful number, since it uses less digits than its factorization.

243855225453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313842036.

The product of its digits is 5760000, while the sum is 48.

Subtracting 243855225453 from its reverse (354522558342), we obtain a square (110667332889 = 332667²).

The spelling of 243855225453 in words is "two hundred forty-three billion, eight hundred fifty-five million, two hundred twenty-five thousand, four hundred fifty-three".