10221523 has 4 divisors (see below), whose sum is σ = 11007808. Its totient is φ = 9435240.

The previous prime is 10221521. The next prime is 10221551. The reversal of 10221523 is 32512201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32512201 = 193 ⋅168457.

It is a cyclic number.

It is not a de Polignac number, because 10221523 - 2¹ = 10221521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10221497 and 10221506.

It is not an unprimeable number, because it can be changed into a prime (10221521) 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 in 3 ways as a sum of consecutive naturals, for example, 393123 + ... + 393148.

It is an arithmetic number, because the mean of its divisors is an integer number (2751952).

Almost surely, 2^10221523 is an apocalyptic number.

10221523 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

10221523 is a deficient number, since it is larger than the sum of its proper divisors (786285).

10221523 is an equidigital number, since it uses as much as digits as its factorization.

10221523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786284.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 10221523 is about 3197.1116652379. Note that the first 3 decimals coincide. The cubic root of 10221523 is about 217.0227205499.

Adding to 10221523 its reverse (32512201), we get a palindrome (42733724).

The spelling of 10221523 in words is "ten million, two hundred twenty-one thousand, five hundred twenty-three".