243141331 has 2 divisors, whose sum is σ = 243141332. Its totient is φ = 243141330.

The previous prime is 243141317. The next prime is 243141341. The reversal of 243141331 is 133141342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243141331 - 2⁹ = 243140819 is a prime.

It is a super-2 number, since 2×243141331² = 118235413680903122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243141341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121570665 + 121570666.

It is an arithmetic number, because the mean of its divisors is an integer number (121570666).

Almost surely, 2^243141331 is an apocalyptic number.

243141331 is a deficient number, since it is larger than the sum of its proper divisors (1).

243141331 is an equidigital number, since it uses as much as digits as its factorization.

243141331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 243141331 is about 15592.9898031134. The cubic root of 243141331 is about 624.1461030272.

Adding to 243141331 its reverse (133141342), we get a palindrome (376282673).

The spelling of 243141331 in words is "two hundred forty-three million, one hundred forty-one thousand, three hundred thirty-one".