522652021 has 2 divisors, whose sum is σ = 522652022. Its totient is φ = 522652020.

The previous prime is 522652003. The next prime is 522652037. The reversal of 522652021 is 120256225.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 455182225 + 67469796 = 21335^2 + 8214^2 .

It is a cyclic number.

It is not a de Polignac number, because 522652021 - 2²⁵ = 489097589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (522652321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261326010 + 261326011.

It is an arithmetic number, because the mean of its divisors is an integer number (261326011).

Almost surely, 2^522652021 is an apocalyptic number.

It is an amenable number.

522652021 is a deficient number, since it is larger than the sum of its proper divisors (1).

522652021 is an equidigital number, since it uses as much as digits as its factorization.

522652021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 522652021 is about 22861.5839564979. The cubic root of 522652021 is about 805.5098918469.

The spelling of 522652021 in words is "five hundred twenty-two million, six hundred fifty-two thousand, twenty-one".