243146117 has 4 divisors (see below), whose sum is σ = 245652876. Its totient is φ = 240639360.

The previous prime is 243146107. The next prime is 243146143. The reversal of 243146117 is 711641342.

It is a happy number.

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 66814276 + 176331841 = 8174^2 + 13279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243146117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243146117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243146107) 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, 1253234 + ... + 1253427.

It is an arithmetic number, because the mean of its divisors is an integer number (61413219).

Almost surely, 2^243146117 is an apocalyptic number.

It is an amenable number.

243146117 is a deficient number, since it is larger than the sum of its proper divisors (2506759).

243146117 is an equidigital number, since it uses as much as digits as its factorization.

243146117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506758.

The product of its digits is 4032, while the sum is 29.

The square root of 243146117 is about 15593.1432687576. The cubic root of 243146117 is about 624.1501982362.

Adding to 243146117 its reverse (711641342), we get a palindrome (954787459).

The spelling of 243146117 in words is "two hundred forty-three million, one hundred forty-six thousand, one hundred seventeen".