243125047 has 4 divisors (see below), whose sum is σ = 265227336. Its totient is φ = 221022760.

The previous prime is 243125027. The next prime is 243125059. The reversal of 243125047 is 740521342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243125047 - 2¹⁵ = 243092279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243125027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11051128 + ... + 11051149.

It is an arithmetic number, because the mean of its divisors is an integer number (66306834).

Almost surely, 2^243125047 is an apocalyptic number.

243125047 is a deficient number, since it is larger than the sum of its proper divisors (22102289).

243125047 is a wasteful number, since it uses less digits than its factorization.

243125047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22102288.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 243125047 is about 15592.4676366507. The cubic root of 243125047 is about 624.1321689887.

Adding to 243125047 its reverse (740521342), we get a palindrome (983646389).

The spelling of 243125047 in words is "two hundred forty-three million, one hundred twenty-five thousand, forty-seven".