242431331 has 2 divisors, whose sum is σ = 242431332. Its totient is φ = 242431330.

The previous prime is 242431327. The next prime is 242431379. The reversal of 242431331 is 133134242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242431331 - 2² = 242431327 is a prime.

It is a super-2 number, since 2×242431331² = 117545900500863122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 242431297 and 242431306.

It is not a weakly prime, because it can be changed into another prime (242431391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121215665 + 121215666.

It is an arithmetic number, because the mean of its divisors is an integer number (121215666).

Almost surely, 2^242431331 is an apocalyptic number.

242431331 is a deficient number, since it is larger than the sum of its proper divisors (1).

242431331 is an equidigital number, since it uses as much as digits as its factorization.

242431331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 23.

The square root of 242431331 is about 15570.2065175771. The cubic root of 242431331 is about 623.5379851401.

Adding to 242431331 its reverse (133134242), we get a palindrome (375565573).

The spelling of 242431331 in words is "two hundred forty-two million, four hundred thirty-one thousand, three hundred thirty-one".