243431433 has 16 divisors (see below), whose sum is σ = 412159360. Its totient is φ = 139103568.

The previous prime is 243431429. The next prime is 243431443. The reversal of 243431433 is 334134342.

It is not a de Polignac number, because 243431433 - 2² = 243431429 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243431397 and 243431406.

It is not an unprimeable number, because it can be changed into a prime (243431413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 643810 + ... + 644187.

It is an arithmetic number, because the mean of its divisors is an integer number (25759960).

Almost surely, 2^243431433 is an apocalyptic number.

It is an amenable number.

243431433 is a deficient number, since it is larger than the sum of its proper divisors (168727927).

243431433 is a wasteful number, since it uses less digits than its factorization.

243431433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288013 (or 1288007 counting only the distinct ones).

The product of its digits is 10368, while the sum is 27.

The square root of 243431433 is about 15602.2893512459. The cubic root of 243431433 is about 624.3942358961.

Adding to 243431433 its reverse (334134342), we get a palindrome (577565775).

The spelling of 243431433 in words is "two hundred forty-three million, four hundred thirty-one thousand, four hundred thirty-three".