522152821 has 2 divisors, whose sum is σ = 522152822. Its totient is φ = 522152820.

The previous prime is 522152819. The next prime is 522152833. The reversal of 522152821 is 128251225.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 521619921 + 532900 = 22839^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 522152821 - 2¹ = 522152819 is a prime.

Together with 522152819, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 522152821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (522152021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261076410 + 261076411.

It is an arithmetic number, because the mean of its divisors is an integer number (261076411).

Almost surely, 2^522152821 is an apocalyptic number.

It is an amenable number.

522152821 is a deficient number, since it is larger than the sum of its proper divisors (1).

522152821 is an equidigital number, since it uses as much as digits as its factorization.

522152821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3200, while the sum is 28.

The square root of 522152821 is about 22850.6634695800. The cubic root of 522152821 is about 805.2533549210.

The spelling of 522152821 in words is "five hundred twenty-two million, one hundred fifty-two thousand, eight hundred twenty-one".