2340215221 has 2 divisors, whose sum is σ = 2340215222. Its totient is φ = 2340215220.

The previous prime is 2340215219. The next prime is 2340215243. The reversal of 2340215221 is 1225120432.

It is a happy number.

It is an a-pointer prime, because the next prime (2340215243) can be obtained adding 2340215221 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1635312721 + 704902500 = 40439^2 + 26550^2 .

It is a cyclic number.

It is not a de Polignac number, because 2340215221 - 2¹ = 2340215219 is a prime.

Together with 2340215219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2340215192 and 2340215201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2340215281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1170107610 + 1170107611.

It is an arithmetic number, because the mean of its divisors is an integer number (1170107611).

Almost surely, 2^2340215221 is an apocalyptic number.

It is an amenable number.

2340215221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2340215221 is an equidigital number, since it uses as much as digits as its factorization.

2340215221 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 2340215221 is about 48375.7710119436. The cubic root of 2340215221 is about 1327.6550953641.

Adding to 2340215221 its reverse (1225120432), we get a palindrome (3565335653).

The spelling of 2340215221 in words is "two billion, three hundred forty million, two hundred fifteen thousand, two hundred twenty-one".