243246220 has 48 divisors (see below), whose sum is σ = 591812928. Its totient is φ = 82252800.

The previous prime is 243246193. The next prime is 243246233. The reversal of 243246220 is 22642342.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1681 + ... + 22120.

It is an arithmetic number, because the mean of its divisors is an integer number (12329436).

Almost surely, 2^243246220 is an apocalyptic number.

243246220 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 243246220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295906464).

243246220 is an abundant number, since it is smaller than the sum of its proper divisors (348566708).

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

243246220 is a wasteful number, since it uses less digits than its factorization.

243246220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23890 (or 23888 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 243246220 is about 15596.3527787749. The cubic root of 243246220 is about 624.2358404771.

Adding to 243246220 its reverse (22642342), we get a palindrome (265888562).

The spelling of 243246220 in words is "two hundred forty-three million, two hundred forty-six thousand, two hundred twenty".