243320225420 has 24 divisors (see below), whose sum is σ = 511286599824. Its totient is φ = 97268256576.

The previous prime is 243320225417. The next prime is 243320225437. The reversal of 243320225420 is 24522023342.

It is a super-2 number, since 2×243320225420² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3706247 + ... + 3771326.

It is an arithmetic number, because the mean of its divisors is an integer number (21303608326).

Almost surely, 2^243320225420 is an apocalyptic number.

243320225420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243320225420 is an abundant number, since it is smaller than the sum of its proper divisors (267966374404).

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

243320225420 is a wasteful number, since it uses less digits than its factorization.

243320225420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7479209 (or 7479207 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 29.

Adding to 243320225420 its reverse (24522023342), we get a palindrome (267842248762).

The spelling of 243320225420 in words is "two hundred forty-three billion, three hundred twenty million, two hundred twenty-five thousand, four hundred twenty".