243201650 has 12 divisors (see below), whose sum is σ = 452355162. Its totient is φ = 97280640.

The previous prime is 243201649. The next prime is 243201659. The reversal of 243201650 is 56102342.

It can be written as a sum of positive squares in 3 ways, for example, as 129800449 + 113401201 = 11393^2 + 10649^2 .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243201659) 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 5 ways as a sum of consecutive naturals, for example, 2431967 + ... + 2432066.

Almost surely, 2^243201650 is an apocalyptic number.

243201650 is a deficient number, since it is larger than the sum of its proper divisors (209153512).

243201650 is a wasteful number, since it uses less digits than its factorization.

243201650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4864045 (or 4864040 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 243201650 is about 15594.9238536134. The cubic root of 243201650 is about 624.1977119081.

Adding to 243201650 its reverse (56102342), we get a palindrome (299303992).

The spelling of 243201650 in words is "two hundred forty-three million, two hundred one thousand, six hundred fifty".