243253031321420 has 48 divisors (see below), whose sum is σ = 537720284317440. Its totient is φ = 92179571990976.

The previous prime is 243253031321359. The next prime is 243253031321431. The reversal of 243253031321420 is 24123130352342.

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, 68695649 + ... + 72149831.

It is an arithmetic number, because the mean of its divisors is an integer number (11202505923280).

Almost surely, 2^{243253031321420} is an apocalyptic number.

243253031321420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243253031321420 is an abundant number, since it is smaller than the sum of its proper divisors (294467252996020).

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

243253031321420 is a wasteful number, since it uses less digits than its factorization.

243253031321420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639534 (or 3639532 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 35.

Adding to 243253031321420 its reverse (24123130352342), we get a palindrome (267376161673762).

The spelling of 243253031321420 in words is "two hundred forty-three trillion, two hundred fifty-three billion, thirty-one million, three hundred twenty-one thousand, four hundred twenty".