243221312130 has 32 divisors (see below), whose sum is σ = 584847307584. Its totient is φ = 64734998976.

The previous prime is 243221312083. The next prime is 243221312137. The reversal of 243221312130 is 31213122342.

It is a self number, because there is not a number n which added to its sum of digits gives 243221312130.

It is not an unprimeable number, because it can be changed into a prime (243221312137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7735149 + ... + 7766528.

It is an arithmetic number, because the mean of its divisors is an integer number (18276478362).

Almost surely, 2^243221312130 is an apocalyptic number.

243221312130 is an abundant number, since it is smaller than the sum of its proper divisors (341625995454).

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

243221312130 is a wasteful number, since it uses less digits than its factorization.

243221312130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15502210.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 243221312130 its reverse (31213122342), we get a palindrome (274434434472).

The spelling of 243221312130 in words is "two hundred forty-three billion, two hundred twenty-one million, three hundred twelve thousand, one hundred thirty".