522366521 has 2 divisors, whose sum is σ = 522366522. Its totient is φ = 522366520.

The previous prime is 522366517. The next prime is 522366541. The reversal of 522366521 is 125663225.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 521437225 + 929296 = 22835^2 + 964^2 .

It is a cyclic number.

It is not a de Polignac number, because 522366521 - 2² = 522366517 is a prime.

It is not a weakly prime, because it can be changed into another prime (522366511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261183260 + 261183261.

It is an arithmetic number, because the mean of its divisors is an integer number (261183261).

Almost surely, 2^522366521 is an apocalyptic number.

It is an amenable number.

522366521 is a deficient number, since it is larger than the sum of its proper divisors (1).

522366521 is an equidigital number, since it uses as much as digits as its factorization.

522366521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

The square root of 522366521 is about 22855.3390042677. The cubic root of 522366521 is about 805.3631945212.

The spelling of 522366521 in words is "five hundred twenty-two million, three hundred sixty-six thousand, five hundred twenty-one".