243020117 has 4 divisors (see below), whose sum is σ = 257315436. Its totient is φ = 228724800.

The previous prime is 243020081. The next prime is 243020119. The reversal of 243020117 is 711020342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 185123236 + 57896881 = 13606^2 + 7609^2 .

It is not a de Polignac number, because 243020117 - 2¹⁸ = 242757973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243020119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7147634 + ... + 7147667.

It is an arithmetic number, because the mean of its divisors is an integer number (64328859).

Almost surely, 2^243020117 is an apocalyptic number.

It is an amenable number.

243020117 is a deficient number, since it is larger than the sum of its proper divisors (14295319).

243020117 is a wasteful number, since it uses less digits than its factorization.

243020117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14295318.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 243020117 is about 15589.1025078418. The cubic root of 243020117 is about 624.0423666240.

Adding to 243020117 its reverse (711020342), we get a palindrome (954040459).

The spelling of 243020117 in words is "two hundred forty-three million, twenty thousand, one hundred seventeen".