422570521 has 2 divisors, whose sum is σ = 422570522. Its totient is φ = 422570520.

The previous prime is 422570497. The next prime is 422570527. The reversal of 422570521 is 125075224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 361418121 + 61152400 = 19011^2 + 7820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422570521 is a prime.

It is a super-2 number, since 2×422570521² = 357131690436422882, which contains 22 as substring.

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 422570521.

It is not a weakly prime, because it can be changed into another prime (422570527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211285260 + 211285261.

It is an arithmetic number, because the mean of its divisors is an integer number (211285261).

Almost surely, 2^422570521 is an apocalyptic number.

It is an amenable number.

422570521 is a deficient number, since it is larger than the sum of its proper divisors (1).

422570521 is an equidigital number, since it uses as much as digits as its factorization.

422570521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 422570521 is about 20556.5201578477. The cubic root of 422570521 is about 750.4119342980.

The spelling of 422570521 in words is "four hundred twenty-two million, five hundred seventy thousand, five hundred twenty-one".