243264745 has 4 divisors (see below), whose sum is σ = 291917700. Its totient is φ = 194611792.

The previous prime is 243264683. The next prime is 243264757. The reversal of 243264745 is 547462342.

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 76545001 + 166719744 = 8749^2 + 12912^2 .

It is a cyclic number.

It is not a de Polignac number, because 243264745 - 2¹⁷ = 243133673 is a prime.

It is a super-3 number, since 3×243264745³ (a number of 26 digits) contains 333 as substring.

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, 24326470 + ... + 24326479.

It is an arithmetic number, because the mean of its divisors is an integer number (72979425).

Almost surely, 2^243264745 is an apocalyptic number.

It is an amenable number.

243264745 is a deficient number, since it is larger than the sum of its proper divisors (48652955).

243264745 is an equidigital number, since it uses as much as digits as its factorization.

243264745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48652954.

The product of its digits is 161280, while the sum is 37.

The square root of 243264745 is about 15596.9466563171. The cubic root of 243264745 is about 624.2516868013.

The spelling of 243264745 in words is "two hundred forty-three million, two hundred sixty-four thousand, seven hundred forty-five".