243213040 has 120 divisors (see below), whose sum is σ = 676394208. Its totient is φ = 79664640.

The previous prime is 243213037. The next prime is 243213041. The reversal of 243213040 is 40312342.

It is a junction number, because it is equal to n+sod(n) for n = 243212999 and 243213017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243213041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 295830 + ... + 296650.

Almost surely, 2^243213040 is an apocalyptic number.

243213040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243213040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338197104).

243213040 is an abundant number, since it is smaller than the sum of its proper divisors (433181168).

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

243213040 is a wasteful number, since it uses less digits than its factorization.

243213040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887 (or 858 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 243213040 is about 15595.2890322687. The cubic root of 243213040 is about 624.2074562238.

Adding to 243213040 its reverse (40312342), we get a palindrome (283525382).

The spelling of 243213040 in words is "two hundred forty-three million, two hundred thirteen thousand, forty".