10199521 has 4 divisors (see below), whose sum is σ = 10206000. Its totient is φ = 10193044.

The previous prime is 10199509. The next prime is 10199537. The reversal of 10199521 is 12599101.

10199521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12599101 = 23 ⋅547787.

It is a cyclic number.

It is not a de Polignac number, because 10199521 - 2⁹ = 10199009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10199521.

It is not an unprimeable number, because it can be changed into a prime (10199551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810 + ... + 4588.

It is an arithmetic number, because the mean of its divisors is an integer number (2551500).

Almost surely, 2^10199521 is an apocalyptic number.

It is an amenable number.

10199521 is a deficient number, since it is larger than the sum of its proper divisors (6479).

10199521 is an equidigital number, since it uses as much as digits as its factorization.

10199521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6478.

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 10199521 is about 3193.6688932950. The cubic root of 10199521 is about 216.8668936723.

The spelling of 10199521 in words is "ten million, one hundred ninety-nine thousand, five hundred twenty-one".