240522221 has 2 divisors, whose sum is σ = 240522222. Its totient is φ = 240522220.

The previous prime is 240522209. The next prime is 240522253. The reversal of 240522221 is 122225042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157000900 + 83521321 = 12530^2 + 9139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240522221 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 240522193 and 240522202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240572221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120261110 + 120261111.

It is an arithmetic number, because the mean of its divisors is an integer number (120261111).

Almost surely, 2^240522221 is an apocalyptic number.

It is an amenable number.

240522221 is a deficient number, since it is larger than the sum of its proper divisors (1).

240522221 is an equidigital number, since it uses as much as digits as its factorization.

240522221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 240522221 is about 15508.7788365171. The cubic root of 240522221 is about 621.8969141239.

Adding to 240522221 its reverse (122225042), we get a palindrome (362747263).

The spelling of 240522221 in words is "two hundred forty million, five hundred twenty-two thousand, two hundred twenty-one".