243550140 has 24 divisors (see below), whose sum is σ = 681940560. Its totient is φ = 64946688.

The previous prime is 243550133. The next prime is 243550141. The reversal of 243550140 is 41055342.

243550140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×243550140³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 243550140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243550141) 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, 2029525 + ... + 2029644.

It is an arithmetic number, because the mean of its divisors is an integer number (28414190).

Almost surely, 2^243550140 is an apocalyptic number.

243550140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243550140 is an abundant number, since it is smaller than the sum of its proper divisors (438390420).

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

243550140 is a wasteful number, since it uses less digits than its factorization.

243550140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4059181 (or 4059179 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 243550140 is about 15606.0930408607. The cubic root of 243550140 is about 624.4957126870.

The spelling of 243550140 in words is "two hundred forty-three million, five hundred fifty thousand, one hundred forty".