105525521 has 4 divisors (see below), whose sum is σ = 106056000. Its totient is φ = 104995044.

The previous prime is 105525499. The next prime is 105525523. The reversal of 105525521 is 125525501.

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 an emirpimes, since its reverse is a distinct semiprime: 125525501 = 17 ⋅7383853.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105525521 is a prime.

It is a super-2 number, since 2×105525521² = 22271271164642882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105525523) 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, 264941 + ... + 265338.

It is an arithmetic number, because the mean of its divisors is an integer number (26514000).

Almost surely, 2^105525521 is an apocalyptic number.

It is an amenable number.

105525521 is a deficient number, since it is larger than the sum of its proper divisors (530479).

105525521 is an equidigital number, since it uses as much as digits as its factorization.

105525521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530478.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 105525521 is about 10272.5615598058. The cubic root of 105525521 is about 472.5551512194. Note that the first 3 decimals are identical.

The spelling of 105525521 in words is "one hundred five million, five hundred twenty-five thousand, five hundred twenty-one".