243125432021 has 8 divisors (see below), whose sum is σ = 243909250200. Its totient is φ = 242342830080.

The previous prime is 243125432009. The next prime is 243125432029. The reversal of 243125432021 is 120234521342.

It can be written as a sum of positive squares in 4 ways, for example, as 13622157796 + 229503274225 = 116714^2 + 479065^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 243125432021 - 2²² = 243121237717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243125432029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97235 + ... + 704063.

It is an arithmetic number, because the mean of its divisors is an integer number (30488656275).

Almost surely, 2^243125432021 is an apocalyptic number.

It is an amenable number.

243125432021 is a deficient number, since it is larger than the sum of its proper divisors (783818179).

243125432021 is an equidigital number, since it uses as much as digits as its factorization.

243125432021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608119.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 243125432021 its reverse (120234521342), we get a palindrome (363359953363).

The spelling of 243125432021 in words is "two hundred forty-three billion, one hundred twenty-five million, four hundred thirty-two thousand, twenty-one".