243501423453 has 28 divisors (see below), whose sum is σ = 380958417120. Its totient is φ = 155276259336.

The previous prime is 243501423433. The next prime is 243501423457. The reversal of 243501423453 is 354324105342.

243501423453 is a `hidden beast` number, since 2 + 435 + 0 + 142 + 34 + 53 = 666.

It is not a de Polignac number, because 243501423453 - 2⁸ = 243501423197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243501423457) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 7244563 + ... + 7278096.

Almost surely, 2^243501423453 is an apocalyptic number.

243501423453 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

243501423453 is a deficient number, since it is larger than the sum of its proper divisors (137456993667).

243501423453 is an equidigital number, since it uses as much as digits as its factorization.

243501423453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14522700 (or 14522685 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

Adding to 243501423453 its reverse (354324105342), we get a palindrome (597825528795).

The spelling of 243501423453 in words is "two hundred forty-three billion, five hundred one million, four hundred twenty-three thousand, four hundred fifty-three".