243402220 has 48 divisors (see below), whose sum is σ = 530460000. Its totient is φ = 93815232.

The previous prime is 243402167. The next prime is 243402241. The reversal of 243402220 is 22204342.

It is a congruent number.

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, 487531 + ... + 488029.

It is an arithmetic number, because the mean of its divisors is an integer number (11051250).

Almost surely, 2^243402220 is an apocalyptic number.

243402220 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 243402220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265230000).

243402220 is an abundant number, since it is smaller than the sum of its proper divisors (287057780).

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

243402220 is an equidigital number, since it uses as much as digits as its factorization.

243402220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595 (or 535 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 243402220 is about 15601.3531464421. The cubic root of 243402220 is about 624.3692580775.

Adding to 243402220 its reverse (22204342), we get a palindrome (265606562).

The spelling of 243402220 in words is "two hundred forty-three million, four hundred two thousand, two hundred twenty".