243200101 has 2 divisors, whose sum is σ = 243200102. Its totient is φ = 243200100.

The previous prime is 243200051. The next prime is 243200129. The reversal of 243200101 is 101002342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185667876 + 57532225 = 13626^2 + 7585^2 .

It is a cyclic number.

It is not a de Polignac number, because 243200101 - 2⁷ = 243199973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243200501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121600050 + 121600051.

It is an arithmetic number, because the mean of its divisors is an integer number (121600051).

Almost surely, 2^243200101 is an apocalyptic number.

It is an amenable number.

243200101 is a deficient number, since it is larger than the sum of its proper divisors (1).

243200101 is an equidigital number, since it uses as much as digits as its factorization.

243200101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 243200101 is about 15594.8741899382. The cubic root of 243200101 is about 624.1963866919.

Adding to 243200101 its reverse (101002342), we get a palindrome (344202443).

The spelling of 243200101 in words is "two hundred forty-three million, two hundred thousand, one hundred one".