105521091 has 16 divisors (see below), whose sum is σ = 160431264. Its totient is φ = 61115904.

The previous prime is 105521089. The next prime is 105521093. The reversal of 105521091 is 190125501.

It is an interprime number because it is at equal distance from previous prime (105521089) and next prime (105521093).

It is not a de Polignac number, because 105521091 - 2¹ = 105521089 is a prime.

It is a super-2 number, since 2×105521091² = 22269401291660562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105521093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78916 + ... + 80241.

It is an arithmetic number, because the mean of its divisors is an integer number (10026954).

Almost surely, 2^105521091 is an apocalyptic number.

105521091 is a deficient number, since it is larger than the sum of its proper divisors (54910173).

105521091 is a wasteful number, since it uses less digits than its factorization.

105521091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159190.

The product of its (nonzero) digits is 450, while the sum is 24.

The square root of 105521091 is about 10272.3459345955. The cubic root of 105521091 is about 472.5485384475.

Adding to 105521091 its reverse (190125501), we get a palindrome (295646592).

The spelling of 105521091 in words is "one hundred five million, five hundred twenty-one thousand, ninety-one".