243303775 has 72 divisors (see below), whose sum is σ = 374038560. Its totient is φ = 155654400.

The previous prime is 243303773. The next prime is 243303791. The reversal of 243303775 is 577303342.

It is not a de Polignac number, because 243303775 - 2¹ = 243303773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243303775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243303773) 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 71 ways as a sum of consecutive naturals, for example, 904341 + ... + 904609.

It is an arithmetic number, because the mean of its divisors is an integer number (5194980).

Almost surely, 2^243303775 is an apocalyptic number.

243303775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

243303775 is a deficient number, since it is larger than the sum of its proper divisors (130734785).

243303775 is a wasteful number, since it uses less digits than its factorization.

243303775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 34.

The square root of 243303775 is about 15598.1978125680. The cubic root of 243303775 is about 624.2850705131.

It can be divided in two parts, 243 and 303775, that multiplied together give a triangular number (73817325 = T₁₂₁₅₀).

The spelling of 243303775 in words is "two hundred forty-three million, three hundred three thousand, seven hundred seventy-five".