243200431 has 4 divisors (see below), whose sum is σ = 243922432. Its totient is φ = 242478432.

The previous prime is 243200423. The next prime is 243200443. The reversal of 243200431 is 134002342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134002342 = 2 ⋅67001171.

It is a cyclic number.

It is not a de Polignac number, because 243200431 - 2³ = 243200423 is a prime.

It is a super-2 number, since 2×243200431² = 118292899277171522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243200399 and 243200408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243200731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360495 + ... + 361168.

It is an arithmetic number, because the mean of its divisors is an integer number (60980608).

Almost surely, 2^243200431 is an apocalyptic number.

243200431 is a deficient number, since it is larger than the sum of its proper divisors (722001).

243200431 is an equidigital number, since it uses as much as digits as its factorization.

243200431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722000.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 243200431 is about 15594.8847703341. The cubic root of 243200431 is about 624.1966690173.

Adding to 243200431 its reverse (134002342), we get a palindrome (377202773).

The spelling of 243200431 in words is "two hundred forty-three million, two hundred thousand, four hundred thirty-one".