243415197 has 12 divisors (see below), whose sum is σ = 372282300. Its totient is φ = 152731008.

The previous prime is 243415189. The next prime is 243415199. The reversal of 243415197 is 791514342.

It can be written as a sum of positive squares in 2 ways, for example, as 70913241 + 172501956 = 8421^2 + 13134^2 .

It is not a de Polignac number, because 243415197 - 2³ = 243415189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243415199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 795322 + ... + 795627.

It is an arithmetic number, because the mean of its divisors is an integer number (31023525).

Almost surely, 2^243415197 is an apocalyptic number.

It is an amenable number.

243415197 is a deficient number, since it is larger than the sum of its proper divisors (128867103).

243415197 is a wasteful number, since it uses less digits than its factorization.

243415197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590972 (or 1590969 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 243415197 is about 15601.7690343115. The cubic root of 243415197 is about 624.3803539718.

The spelling of 243415197 in words is "two hundred forty-three million, four hundred fifteen thousand, one hundred ninety-seven".