222240521 has 2 divisors, whose sum is σ = 222240522. Its totient is φ = 222240520.

The previous prime is 222240517. The next prime is 222240527. The reversal of 222240521 is 125042222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219040000 + 3200521 = 14800^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 222240521 - 2² = 222240517 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 222240493 and 222240502.

It is not a weakly prime, because it can be changed into another prime (222240527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111120260 + 111120261.

It is an arithmetic number, because the mean of its divisors is an integer number (111120261).

Almost surely, 2^222240521 is an apocalyptic number.

It is an amenable number.

222240521 is a deficient number, since it is larger than the sum of its proper divisors (1).

222240521 is an equidigital number, since it uses as much as digits as its factorization.

222240521 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 222240521 is about 14907.7335970294. The cubic root of 222240521 is about 605.7234893640.

Adding to 222240521 its reverse (125042222), we get a palindrome (347282743).

The spelling of 222240521 in words is "two hundred twenty-two million, two hundred forty thousand, five hundred twenty-one".