243112345 has 16 divisors (see below), whose sum is σ = 333704448. Its totient is φ = 166559040.

The previous prime is 243112343. The next prime is 243112351. The reversal of 243112345 is 543211342.

It is not a de Polignac number, because 243112345 - 2¹ = 243112343 is a prime.

It is a super-2 number, since 2×243112345² = 118207224582798050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243112343) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 50587 + ... + 55183.

It is an arithmetic number, because the mean of its divisors is an integer number (20856528).

Almost surely, 2^243112345 is an apocalyptic number.

It is an amenable number.

243112345 is a deficient number, since it is larger than the sum of its proper divisors (90592103).

243112345 is a wasteful number, since it uses less digits than its factorization.

243112345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6120.

The product of its digits is 2880, while the sum is 25.

The square root of 243112345 is about 15592.0603192779. The cubic root of 243112345 is about 624.1212995959.

Adding to 243112345 its reverse (543211342), we get a palindrome (786323687).

The spelling of 243112345 in words is "two hundred forty-three million, one hundred twelve thousand, three hundred forty-five".