243132541 has 2 divisors, whose sum is σ = 243132542. Its totient is φ = 243132540.

The previous prime is 243132529. The next prime is 243132577. The reversal of 243132541 is 145231342.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217680516 + 25452025 = 14754^2 + 5045^2 .

It is a cyclic number.

It is not a de Polignac number, because 243132541 - 2⁵ = 243132509 is a prime.

It is a super-2 number, since 2×243132541² = 118226864986233362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243132511) 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 as a sum of consecutive naturals, namely, 121566270 + 121566271.

It is an arithmetic number, because the mean of its divisors is an integer number (121566271).

Almost surely, 2^243132541 is an apocalyptic number.

It is an amenable number.

243132541 is a deficient number, since it is larger than the sum of its proper divisors (1).

243132541 is an equidigital number, since it uses as much as digits as its factorization.

243132541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 25.

The square root of 243132541 is about 15592.7079431380. The cubic root of 243132541 is about 624.1385815988.

Adding to 243132541 its reverse (145231342), we get a palindrome (388363883).

The spelling of 243132541 in words is "two hundred forty-three million, one hundred thirty-two thousand, five hundred forty-one".