240421331 has 2 divisors, whose sum is σ = 240421332. Its totient is φ = 240421330.

The previous prime is 240421297. The next prime is 240421351. The reversal of 240421331 is 133124042.

240421331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (240421351) can be obtained adding 240421331 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 240421331 - 2⁶ = 240421267 is a prime.

It is a super-2 number, since 2×240421331² = 115604832799623122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (240421351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120210665 + 120210666.

It is an arithmetic number, because the mean of its divisors is an integer number (120210666).

Almost surely, 2^240421331 is an apocalyptic number.

240421331 is a deficient number, since it is larger than the sum of its proper divisors (1).

240421331 is an equidigital number, since it uses as much as digits as its factorization.

240421331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 240421331 is about 15505.5258214612. The cubic root of 240421331 is about 621.8099478632.

Adding to 240421331 its reverse (133124042), we get a palindrome (373545373).

The spelling of 240421331 in words is "two hundred forty million, four hundred twenty-one thousand, three hundred thirty-one".