243125440251 has 8 divisors (see below), whose sum is σ = 325846877520. Its totient is φ = 161243814912.

The previous prime is 243125440241. The next prime is 243125440273. The reversal of 243125440251 is 152044521342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243125440251 - 2²⁹ = 242588569339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243125440241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209952306 + ... + 209953463.

It is an arithmetic number, because the mean of its divisors is an integer number (40730859690).

Almost surely, 2^243125440251 is an apocalyptic number.

243125440251 is a deficient number, since it is larger than the sum of its proper divisors (82721437269).

243125440251 is a wasteful number, since it uses less digits than its factorization.

243125440251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419905965.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 243125440251 its reverse (152044521342), we get a palindrome (395169961593).

The spelling of 243125440251 in words is "two hundred forty-three billion, one hundred twenty-five million, four hundred forty thousand, two hundred fifty-one".