240215317 has 2 divisors, whose sum is σ = 240215318. Its totient is φ = 240215316.

The previous prime is 240215303. The next prime is 240215341. The reversal of 240215317 is 713512042.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209844196 + 30371121 = 14486^2 + 5511^2 .

It is a cyclic number.

It is not a de Polignac number, because 240215317 - 2¹¹ = 240213269 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 240215291 and 240215300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240215387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120107658 + 120107659.

It is an arithmetic number, because the mean of its divisors is an integer number (120107659).

Almost surely, 2^240215317 is an apocalyptic number.

It is an amenable number.

240215317 is a deficient number, since it is larger than the sum of its proper divisors (1).

240215317 is an equidigital number, since it uses as much as digits as its factorization.

240215317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 240215317 is about 15498.8811531672. The cubic root of 240215317 is about 621.6322900807.

Adding to 240215317 its reverse (713512042), we get a palindrome (953727359).

The spelling of 240215317 in words is "two hundred forty million, two hundred fifteen thousand, three hundred seventeen".