243263550 has 48 divisors (see below), whose sum is σ = 609304752. Its totient is φ = 64224000.

The previous prime is 243263539. The next prime is 243263551. The reversal of 243263550 is 55362342.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243263551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7122 + ... + 23178.

It is an arithmetic number, because the mean of its divisors is an integer number (12693849).

Almost surely, 2^243263550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243263550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304652376).

243263550 is an abundant number, since it is smaller than the sum of its proper divisors (366041202).

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

243263550 is a wasteful number, since it uses less digits than its factorization.

243263550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16173 (or 16168 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 243263550 is about 15596.9083474899. The cubic root of 243263550 is about 624.2506646201.

The spelling of 243263550 in words is "two hundred forty-three million, two hundred sixty-three thousand, five hundred fifty".