243420441140 has 12 divisors (see below), whose sum is σ = 511182926436. Its totient is φ = 97368176448.

The previous prime is 243420441139. The next prime is 243420441157. The reversal of 243420441140 is 41144024342.

It can be written as a sum of positive squares in 2 ways, for example, as 64251096484 + 179169344656 = 253478^2 + 423284^2 .

It is a super-2 number, since 2×243420441140² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6085511009 + ... + 6085511048.

It is an arithmetic number, because the mean of its divisors is an integer number (42598577203).

Almost surely, 2^243420441140 is an apocalyptic number.

243420441140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243420441140 is an abundant number, since it is smaller than the sum of its proper divisors (267762485296).

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

243420441140 is a wasteful number, since it uses less digits than its factorization.

243420441140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12171022066 (or 12171022064 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 243420441140 its reverse (41144024342), we get a palindrome (284564465482).

The spelling of 243420441140 in words is "two hundred forty-three billion, four hundred twenty million, four hundred forty-one thousand, one hundred forty".