243750000 has 180 divisors, whose sum is σ = 847655816. Its totient is φ = 60000000.

The previous prime is 243749999. The next prime is 243750007. The reversal of 243750000 is 57342.

It is a happy number.

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243750007) 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 35 ways as a sum of consecutive naturals, for example, 18749994 + ... + 18750006.

Almost surely, 2^243750000 is an apocalyptic number.

243750000 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 243750000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (423827908).

243750000 is an abundant number, since it is smaller than the sum of its proper divisors (603905816).

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

243750000 is an frugal number, since it uses more digits than its factorization.

243750000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 243750000 is about 15612.4949959960. The cubic root of 243750000 is about 624.6664887307. Note that the first 3 decimals are identical.

It can be divided in two parts, 243 and 750000, that multiplied together give a square (182250000 = 13500²).

The spelling of 243750000 in words is "two hundred forty-three million, seven hundred fifty thousand".