243232455531 has 24 divisors (see below), whose sum is σ = 352102716480. Its totient is φ = 149286455136.

The previous prime is 243232455511. The next prime is 243232455581. The reversal of 243232455531 is 135554232342.

It is not a de Polignac number, because 243232455531 - 2²⁹ = 242695584619 is a prime.

It is a super-3 number, since 3×243232455531³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 243232455531.

It is not an unprimeable number, because it can be changed into a prime (243232455511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 440761 + ... + 825066.

It is an arithmetic number, because the mean of its divisors is an integer number (14670946520).

Almost surely, 2^243232455531 is an apocalyptic number.

243232455531 is a deficient number, since it is larger than the sum of its proper divisors (108870260949).

243232455531 is a wasteful number, since it uses less digits than its factorization.

243232455531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266235 (or 1266222 counting only the distinct ones).

The product of its digits is 432000, while the sum is 39.

Adding to 243232455531 its reverse (135554232342), we get a palindrome (378786687873).

The spelling of 243232455531 in words is "two hundred forty-three billion, two hundred thirty-two million, four hundred fifty-five thousand, five hundred thirty-one".