10217521 has 2 divisors, whose sum is σ = 10217522. Its totient is φ = 10217520.

The previous prime is 10217479. The next prime is 10217563. The reversal of 10217521 is 12571201.

10217521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (10217479) and next prime (10217563).

It can be written as a sum of positive squares in only one way, i.e., 7290000 + 2927521 = 2700^2 + 1711^2 .

It is an emirp because it is prime and its reverse (12571201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10217521 - 2¹⁵ = 10184753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10217821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5108760 + 5108761.

It is an arithmetic number, because the mean of its divisors is an integer number (5108761).

Almost surely, 2^10217521 is an apocalyptic number.

It is an amenable number.

10217521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10217521 is an equidigital number, since it uses as much as digits as its factorization.

10217521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 10217521 is about 3196.4857265441. The cubic root of 10217521 is about 216.9943934503.

Adding to 10217521 its reverse (12571201), we get a palindrome (22788722).

The spelling of 10217521 in words is "ten million, two hundred seventeen thousand, five hundred twenty-one".