243161320 has 32 divisors (see below), whose sum is σ = 547557120. Its totient is φ = 97185600.

The previous prime is 243161287. The next prime is 243161323. The reversal of 243161320 is 23161342.

It is a junction number, because it is equal to n+sod(n) for n = 243161291 and 243161300.

It is not an unprimeable number, because it can be changed into a prime (243161323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94045 + ... + 96595.

It is an arithmetic number, because the mean of its divisors is an integer number (17111160).

Almost surely, 2^243161320 is an apocalyptic number.

243161320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243161320 is an abundant number, since it is smaller than the sum of its proper divisors (304395800).

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

243161320 is a wasteful number, since it uses less digits than its factorization.

243161320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4945 (or 4941 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 243161320 is about 15593.6307510470. The cubic root of 243161320 is about 624.1632065427.

Adding to 243161320 its sum of digits (22), we get a palindrome (243161342).

The spelling of 243161320 in words is "two hundred forty-three million, one hundred sixty-one thousand, three hundred twenty".