243254431 has 4 divisors (see below), whose sum is σ = 278005072. Its totient is φ = 208503792.

The previous prime is 243254423. The next prime is 243254441. The reversal of 243254431 is 134452342.

It is a happy number.

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

It is not a de Polignac number, because 243254431 - 2³ = 243254423 is a prime.

It is a super-2 number, since 2×243254431² = 118345436402267522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243254431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243254441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17375310 + ... + 17375323.

It is an arithmetic number, because the mean of its divisors is an integer number (69501268).

Almost surely, 2^243254431 is an apocalyptic number.

243254431 is a deficient number, since it is larger than the sum of its proper divisors (34750641).

243254431 is an equidigital number, since it uses as much as digits as its factorization.

243254431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34750640.

The product of its digits is 11520, while the sum is 28.

The square root of 243254431 is about 15596.6160111737. The cubic root of 243254431 is about 624.2428642832.

The spelling of 243254431 in words is "two hundred forty-three million, two hundred fifty-four thousand, four hundred thirty-one".