243430520 has 32 divisors (see below), whose sum is σ = 550761120. Its totient is φ = 96831360.

The previous prime is 243430493. The next prime is 243430543. The reversal of 243430520 is 25034342.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9572 + ... + 24051.

It is an arithmetic number, because the mean of its divisors is an integer number (17211285).

Almost surely, 2^243430520 is an apocalyptic number.

243430520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243430520 is an abundant number, since it is smaller than the sum of its proper divisors (307330600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243430520 is a wasteful number, since it uses less digits than its factorization.

243430520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33815 (or 33811 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 243430520 is about 15602.2600926917. The cubic root of 243430520 is about 624.3934552894.

Adding to 243430520 its reverse (25034342), we get a palindrome (268464862).

The spelling of 243430520 in words is "two hundred forty-three million, four hundred thirty thousand, five hundred twenty".