243313040 has 40 divisors (see below), whose sum is σ = 571322808. Its totient is φ = 96358400.

The previous prime is 243313039. The next prime is 243313093. The reversal of 243313040 is 40313342.

It can be written as a sum of positive squares in 4 ways, for example, as 143233024 + 100080016 = 11968^2 + 10004^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6977 + ... + 23136.

Almost surely, 2^243313040 is an apocalyptic number.

243313040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243313040 is an abundant number, since it is smaller than the sum of its proper divisors (328009768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243313040 is a wasteful number, since it uses less digits than its factorization.

243313040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30227 (or 30221 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 243313040 is about 15598.4947991785. The cubic root of 243313040 is about 624.2929946644.

Adding to 243313040 its reverse (40313342), we get a palindrome (283626382).

The spelling of 243313040 in words is "two hundred forty-three million, three hundred thirteen thousand, forty".