240421351 has 2 divisors, whose sum is σ = 240421352. Its totient is φ = 240421350.

The previous prime is 240421331. The next prime is 240421373. The reversal of 240421351 is 153124042.

It is an a-pointer prime, because the next prime (240421373) can be obtained adding 240421351 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240421351 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240421331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120210675 + 120210676.

It is an arithmetic number, because the mean of its divisors is an integer number (120210676).

Almost surely, 2^240421351 is an apocalyptic number.

240421351 is a deficient number, since it is larger than the sum of its proper divisors (1).

240421351 is an equidigital number, since it uses as much as digits as its factorization.

240421351 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 240421351 is about 15505.5264663926. The cubic root of 240421351 is about 621.8099651054.

Adding to 240421351 its reverse (153124042), we get a palindrome (393545393).

The spelling of 240421351 in words is "two hundred forty million, four hundred twenty-one thousand, three hundred fifty-one".