243533040 has 40 divisors (see below), whose sum is σ = 754953168. Its totient is φ = 64942080.

The previous prime is 243533033. The next prime is 243533047. The reversal of 243533040 is 40335342.

It is an interprime number because it is at equal distance from previous prime (243533033) and next prime (243533047).

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

It is a super-3 number, since 3×243533040³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 243533040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243533047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507121 + ... + 507600.

Almost surely, 2^243533040 is an apocalyptic number.

243533040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243533040 is an abundant number, since it is smaller than the sum of its proper divisors (511420128).

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

243533040 is a wasteful number, since it uses less digits than its factorization.

243533040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014737 (or 1014731 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 24.

The square root of 243533040 is about 15605.5451683048. The cubic root of 243533040 is about 624.4810967690.

Adding to 243533040 its reverse (40335342), we get a palindrome (283868382).

The spelling of 243533040 in words is "two hundred forty-three million, five hundred thirty-three thousand, forty".