243155331320 has 64 divisors (see below), whose sum is σ = 608096924640. Its totient is φ = 86751808000.

The previous prime is 243155331281. The next prime is 243155331343. The reversal of 243155331320 is 23133551342.

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, 5190131 + ... + 5236770.

Almost surely, 2^243155331320 is an apocalyptic number.

243155331320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243155331320 is an abundant number, since it is smaller than the sum of its proper divisors (364941593320).

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

243155331320 is a wasteful number, since it uses less digits than its factorization.

243155331320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10426976 (or 10426972 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 32.

Adding to 243155331320 its reverse (23133551342), we get a palindrome (266288882662).

It can be divided in two parts, 243155 and 331320, that added together give a palindrome (574475).

The spelling of 243155331320 in words is "two hundred forty-three billion, one hundred fifty-five million, three hundred thirty-one thousand, three hundred twenty".