243630453 has 16 divisors (see below), whose sum is σ = 361060416. Its totient is φ = 144867840.

The previous prime is 243630449. The next prime is 243630461. The reversal of 243630453 is 354036342.

It is not a de Polignac number, because 243630453 - 2² = 243630449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243630453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243630433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67900 + ... + 71397.

It is an arithmetic number, because the mean of its divisors is an integer number (22566276).

Almost surely, 2^243630453 is an apocalyptic number.

It is an amenable number.

243630453 is a deficient number, since it is larger than the sum of its proper divisors (117429963).

243630453 is a wasteful number, since it uses less digits than its factorization.

243630453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139364.

The product of its (nonzero) digits is 25920, while the sum is 30.

The square root of 243630453 is about 15608.6659583707. The cubic root of 243630453 is about 624.5643496312.

Adding to 243630453 its reverse (354036342), we get a palindrome (597666795).

The spelling of 243630453 in words is "two hundred forty-three million, six hundred thirty thousand, four hundred fifty-three".