243201520 has 40 divisors (see below), whose sum is σ = 595207440. Its totient is φ = 92160000.

The previous prime is 243201509. The next prime is 243201521. The reversal of 243201520 is 25102342.

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

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243201521) 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 7 ways as a sum of consecutive naturals, for example, 78481 + ... + 81520.

It is an arithmetic number, because the mean of its divisors is an integer number (14880186).

Almost surely, 2^243201520 is an apocalyptic number.

243201520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243201520 is an abundant number, since it is smaller than the sum of its proper divisors (352005920).

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

243201520 is a wasteful number, since it uses less digits than its factorization.

243201520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160033 (or 160027 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 243201520 is about 15594.9196855899. The cubic root of 243201520 is about 624.1976006894.

Adding to 243201520 its reverse (25102342), we get a palindrome (268303862).

It can be divided in two parts, 24320 and 1520, that multiplied together give a square (36966400 = 6080²).

The spelling of 243201520 in words is "two hundred forty-three million, two hundred one thousand, five hundred twenty".