243475020 has 144 divisors (see below), whose sum is σ = 787576608. Its totient is φ = 60672000.

The previous prime is 243475019. The next prime is 243475021. The reversal of 243475020 is 20574342.

It is an interprime number because it is at equal distance from previous prime (243475019) and next prime (243475021).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243475021) 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 47 ways as a sum of consecutive naturals, for example, 767902 + ... + 768218.

It is an arithmetic number, because the mean of its divisors is an integer number (5469282).

Almost surely, 2^243475020 is an apocalyptic number.

243475020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243475020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (393788304).

243475020 is an abundant number, since it is smaller than the sum of its proper divisors (544101588).

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

243475020 is a wasteful number, since it uses less digits than its factorization.

243475020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600 (or 595 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 243475020 is about 15603.6861029694. The cubic root of 243475020 is about 624.4315001161.

The spelling of 243475020 in words is "two hundred forty-three million, four hundred seventy-five thousand, twenty".