243294975 has 192 divisors, whose sum is σ = 579010560. Its totient is φ = 97200000.

The previous prime is 243294971. The next prime is 243294991. The reversal of 243294975 is 579492342.

It is not a de Polignac number, because 243294975 - 2² = 243294971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 243294975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243294971) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1611150 + ... + 1611300.

It is an arithmetic number, because the mean of its divisors is an integer number (3015680).

Almost surely, 2^243294975 is an apocalyptic number.

243294975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

243294975 is an abundant number, since it is smaller than the sum of its proper divisors (335715585).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243294975 is a wasteful number, since it uses less digits than its factorization.

243294975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 208 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 243294975 is about 15597.9157261475. The cubic root of 243294975 is about 624.2775438799.

The spelling of 243294975 in words is "two hundred forty-three million, two hundred ninety-four thousand, nine hundred seventy-five".