522220261 has 2 divisors, whose sum is σ = 522220262. Its totient is φ = 522220260.

The previous prime is 522220253. The next prime is 522220271. The reversal of 522220261 is 162022225.

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., 511031236 + 11189025 = 22606^2 + 3345^2 .

It is a cyclic number.

It is not a de Polignac number, because 522220261 - 2³ = 522220253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (522220271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261110130 + 261110131.

It is an arithmetic number, because the mean of its divisors is an integer number (261110131).

Almost surely, 2^522220261 is an apocalyptic number.

It is an amenable number.

522220261 is a deficient number, since it is larger than the sum of its proper divisors (1).

522220261 is an equidigital number, since it uses as much as digits as its factorization.

522220261 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 522220261 is about 22852.1390902471. The cubic root of 522220261 is about 805.2880216228.

Adding to 522220261 its reverse (162022225), we get a palindrome (684242486).

The spelling of 522220261 in words is "five hundred twenty-two million, two hundred twenty thousand, two hundred sixty-one".