243431101 has 2 divisors, whose sum is σ = 243431102. Its totient is φ = 243431100.

The previous prime is 243431087. The next prime is 243431113. The reversal of 243431101 is 101134342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170328601 + 73102500 = 13051^2 + 8550^2 .

It is a cyclic number.

It is not a de Polignac number, because 243431101 - 2¹³ = 243422909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243431141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121715550 + 121715551.

It is an arithmetic number, because the mean of its divisors is an integer number (121715551).

Almost surely, 2^243431101 is an apocalyptic number.

It is an amenable number.

243431101 is a deficient number, since it is larger than the sum of its proper divisors (1).

243431101 is an equidigital number, since it uses as much as digits as its factorization.

243431101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 243431101 is about 15602.2787117780. The cubic root of 243431101 is about 624.3939520393.

Adding to 243431101 its reverse (101134342), we get a palindrome (344565443).

The spelling of 243431101 in words is "two hundred forty-three million, four hundred thirty-one thousand, one hundred one".