243344761 has 48 divisors (see below), whose sum is σ = 305786880. Its totient is φ = 191268000.

The previous prime is 243344729. The next prime is 243344791. The reversal of 243344761 is 167443342.

It is not a de Polignac number, because 243344761 - 2⁵ = 243344729 is a prime.

It is a super-2 number, since 2×243344761² = 118433345412294242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243344711) 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 47 ways as a sum of consecutive naturals, for example, 3427356 + ... + 3427426.

It is an arithmetic number, because the mean of its divisors is an integer number (6370560).

Almost surely, 2^243344761 is an apocalyptic number.

It is an amenable number.

243344761 is a deficient number, since it is larger than the sum of its proper divisors (62442119).

243344761 is a wasteful number, since it uses less digits than its factorization.

243344761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 155 counting only the distinct ones).

The product of its digits is 48384, while the sum is 34.

The square root of 243344761 is about 15599.5115628663. The cubic root of 243344761 is about 624.3201234167.

The spelling of 243344761 in words is "two hundred forty-three million, three hundred forty-four thousand, seven hundred sixty-one".