243403245 has 32 divisors (see below), whose sum is σ = 433497600. Its totient is φ = 129580992.

The previous prime is 243403241. The next prime is 243403327. The reversal of 243403245 is 542304342.

It is not a de Polignac number, because 243403245 - 2² = 243403241 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243403241) 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 31 ways as a sum of consecutive naturals, for example, 94444 + ... + 96986.

It is an arithmetic number, because the mean of its divisors is an integer number (13546800).

Almost surely, 2^243403245 is an apocalyptic number.

It is an amenable number.

243403245 is a deficient number, since it is larger than the sum of its proper divisors (190094355).

243403245 is a wasteful number, since it uses less digits than its factorization.

243403245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266 (or 3260 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 243403245 is about 15601.3859961223. The cubic root of 243403245 is about 624.3701345110.

Adding to 243403245 its reverse (542304342), we get a palindrome (785707587).

The spelling of 243403245 in words is "two hundred forty-three million, four hundred three thousand, two hundred forty-five".