2210521 has 2 divisors, whose sum is σ = 2210522. Its totient is φ = 2210520.

The previous prime is 2210503. The next prime is 2210563. The reversal of 2210521 is 1250122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1354896 + 855625 = 1164^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 2210521 - 2⁹ = 2210009 is a prime.

It is not a weakly prime, because it can be changed into another prime (2210581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105260 + 1105261.

It is an arithmetic number, because the mean of its divisors is an integer number (1105261).

2^2210521 is an apocalyptic number.

It is an amenable number.

2210521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2210521 is an equidigital number, since it uses as much as digits as its factorization.

2210521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 2210521 is about 1486.7820956684. The cubic root of 2210521 is about 130.2661411640.

Adding to 2210521 its reverse (1250122), we get a palindrome (3460643).

The spelling of 2210521 in words is "two million, two hundred ten thousand, five hundred twenty-one".