243155102020 has 12 divisors (see below), whose sum is σ = 510625714284. Its totient is φ = 97262040800.

The previous prime is 243155102017. The next prime is 243155102051. The reversal of 243155102020 is 20201551342.

It can be written as a sum of positive squares in 2 ways, for example, as 66497968384 + 176657133636 = 257872^2 + 420306^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6078877531 + ... + 6078877570.

It is an arithmetic number, because the mean of its divisors is an integer number (42552142857).

Almost surely, 2^243155102020 is an apocalyptic number.

243155102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243155102020 is an abundant number, since it is smaller than the sum of its proper divisors (267470612264).

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

243155102020 is a wasteful number, since it uses less digits than its factorization.

243155102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12157755110 (or 12157755108 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 243155102020 its reverse (20201551342), we get a palindrome (263356653362).

The spelling of 243155102020 in words is "two hundred forty-three billion, one hundred fifty-five million, one hundred two thousand, twenty".