243513420 has 48 divisors (see below), whose sum is σ = 711486720. Its totient is φ = 62113216.

The previous prime is 243513409. The next prime is 243513421. The reversal of 243513420 is 24315342.

It is not an unprimeable number, because it can be changed into a prime (243513421) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 86850 + ... + 89609.

It is an arithmetic number, because the mean of its divisors is an integer number (14822640).

Almost surely, 2^243513420 is an apocalyptic number.

243513420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243513420 is an abundant number, since it is smaller than the sum of its proper divisors (467973300).

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

243513420 is a wasteful number, since it uses less digits than its factorization.

243513420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176494 (or 176492 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 243513420 is about 15604.9165329392. The cubic root of 243513420 is about 624.4643260834.

Adding to 243513420 its reverse (24315342), we get a palindrome (267828762).

The spelling of 243513420 in words is "two hundred forty-three million, five hundred thirteen thousand, four hundred twenty".