242403321331 has 2 divisors, whose sum is σ = 242403321332. Its totient is φ = 242403321330.

The previous prime is 242403321217. The next prime is 242403321337. The reversal of 242403321331 is 133123304242.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 242403321331 - 2¹¹ = 242403319283 is a prime.

It is a super-2 number, since 2×242403321331² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 242403321331.

It is not a weakly prime, because it can be changed into another prime (242403321337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121201660665 + 121201660666.

It is an arithmetic number, because the mean of its divisors is an integer number (121201660666).

Almost surely, 2^242403321331 is an apocalyptic number.

242403321331 is a deficient number, since it is larger than the sum of its proper divisors (1).

242403321331 is an equidigital number, since it uses as much as digits as its factorization.

242403321331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 242403321331 its reverse (133123304242), we get a palindrome (375526625573).

The spelling of 242403321331 in words is "two hundred forty-two billion, four hundred three million, three hundred twenty-one thousand, three hundred thirty-one".