243125440431 has 16 divisors (see below), whose sum is σ = 332287038720. Its totient is φ = 158028812480.

The previous prime is 243125440379. The next prime is 243125440489. The reversal of 243125440431 is 134044521342.

It is not a de Polignac number, because 243125440431 - 2¹⁰ = 243125439407 is a prime.

It is a super-2 number, since 2×243125440431² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243125440392 and 243125440401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243125540431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442185 + ... + 825698.

It is an arithmetic number, because the mean of its divisors is an integer number (20767939920).

Almost surely, 2^243125440431 is an apocalyptic number.

243125440431 is a deficient number, since it is larger than the sum of its proper divisors (89161598289).

243125440431 is a wasteful number, since it uses less digits than its factorization.

243125440431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269486.

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 243125440431 its reverse (134044521342), we get a palindrome (377169961773).

The spelling of 243125440431 in words is "two hundred forty-three billion, one hundred twenty-five million, four hundred forty thousand, four hundred thirty-one".