243213001331 has 2 divisors, whose sum is σ = 243213001332. Its totient is φ = 243213001330.

The previous prime is 243213001303. The next prime is 243213001349. The reversal of 243213001331 is 133100312342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243213001331 - 2⁶ = 243213001267 is a prime.

It is a super-2 number, since 2×243213001331² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243213001297 and 243213001306.

It is not a weakly prime, because it can be changed into another prime (243213001231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121606500665 + 121606500666.

It is an arithmetic number, because the mean of its divisors is an integer number (121606500666).

Almost surely, 2^243213001331 is an apocalyptic number.

243213001331 is a deficient number, since it is larger than the sum of its proper divisors (1).

243213001331 is an equidigital number, since it uses as much as digits as its factorization.

243213001331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 243213001331 its reverse (133100312342), we get a palindrome (376313313673).

The spelling of 243213001331 in words is "two hundred forty-three billion, two hundred thirteen million, one thousand, three hundred thirty-one".