243431023 has 4 divisors (see below), whose sum is σ = 265561128. Its totient is φ = 221300920.

The previous prime is 243431009. The next prime is 243431051. The reversal of 243431023 is 320134342.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243431023 - 2¹³ = 243422831 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243430985 and 243431003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243431323) 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, 11065036 + ... + 11065057.

It is an arithmetic number, because the mean of its divisors is an integer number (66390282).

Almost surely, 2^243431023 is an apocalyptic number.

243431023 is a deficient number, since it is larger than the sum of its proper divisors (22130105).

243431023 is a wasteful number, since it uses less digits than its factorization.

243431023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22130104.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 243431023 is about 15602.2762121429. The cubic root of 243431023 is about 624.3938853501.

Adding to 243431023 its reverse (320134342), we get a palindrome (563565365).

The spelling of 243431023 in words is "two hundred forty-three million, four hundred thirty-one thousand, twenty-three".