243851045 has 4 divisors (see below), whose sum is σ = 292621260. Its totient is φ = 195080832.

The previous prime is 243851029. The next prime is 243851051. The reversal of 243851045 is 540158342.

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 130279396 + 113571649 = 11414^2 + 10657^2 .

It is a cyclic number.

It is not a de Polignac number, because 243851045 - 2⁴ = 243851029 is a prime.

It is a congruent number.

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, 24385100 + ... + 24385109.

It is an arithmetic number, because the mean of its divisors is an integer number (73155315).

Almost surely, 2^243851045 is an apocalyptic number.

It is an amenable number.

243851045 is a deficient number, since it is larger than the sum of its proper divisors (48770215).

243851045 is an equidigital number, since it uses as much as digits as its factorization.

243851045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48770214.

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 243851045 is about 15615.7306905569. The cubic root of 243851045 is about 624.7527939689.

The spelling of 243851045 in words is "two hundred forty-three million, eight hundred fifty-one thousand, forty-five".