243023345 has 4 divisors (see below), whose sum is σ = 291628020. Its totient is φ = 194418672.

The previous prime is 243023303. The next prime is 243023371. The reversal of 243023345 is 543320342.

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 46799281 + 196224064 = 6841^2 + 14008^2 .

It is a cyclic number.

It is not a de Polignac number, because 243023345 - 2²⁰ = 241974769 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24302330 + ... + 24302339.

It is an arithmetic number, because the mean of its divisors is an integer number (72907005).

Almost surely, 2^243023345 is an apocalyptic number.

It is an amenable number.

243023345 is a deficient number, since it is larger than the sum of its proper divisors (48604675).

243023345 is an equidigital number, since it uses as much as digits as its factorization.

243023345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48604674.

The product of its (nonzero) digits is 8640, while the sum is 26.

The square root of 243023345 is about 15589.2060413608. The cubic root of 243023345 is about 624.0451296324.

Adding to 243023345 its reverse (543320342), we get a palindrome (786343687).

The spelling of 243023345 in words is "two hundred forty-three million, twenty-three thousand, three hundred forty-five".