522373021 has 2 divisors, whose sum is σ = 522373022. Its totient is φ = 522373020.

The previous prime is 522373013. The next prime is 522373031. The reversal of 522373021 is 120373225.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296321796 + 226051225 = 17214^2 + 15035^2 .

It is a cyclic number.

It is not a de Polignac number, because 522373021 - 2³ = 522373013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (522373031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261186510 + 261186511.

It is an arithmetic number, because the mean of its divisors is an integer number (261186511).

Almost surely, 2^522373021 is an apocalyptic number.

It is an amenable number.

522373021 is a deficient number, since it is larger than the sum of its proper divisors (1).

522373021 is an equidigital number, since it uses as much as digits as its factorization.

522373021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 522373021 is about 22855.4812025475. The cubic root of 522373021 is about 805.3665349848.

The spelling of 522373021 in words is "five hundred twenty-two million, three hundred seventy-three thousand, twenty-one".