105521280 has 64 divisors (see below), whose sum is σ = 336355200. Its totient is φ = 28138496.

The previous prime is 105521279. The next prime is 105521291. The reversal of 105521280 is 82125501.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×105521280² = 22269481065676800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 105521280.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25560 + ... + 29399.

It is an arithmetic number, because the mean of its divisors is an integer number (5255550).

Almost surely, 2^105521280 is an apocalyptic number.

105521280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

105521280 is an abundant number, since it is smaller than the sum of its proper divisors (230833920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

105521280 is an equidigital number, since it uses as much as digits as its factorization.

105521280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54981 (or 54969 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 105521280 is about 10272.3551340479. The cubic root of 105521280 is about 472.5488205763.

Adding to 105521280 its reverse (82125501), we get a palindrome (187646781).

The spelling of 105521280 in words is "one hundred five million, five hundred twenty-one thousand, two hundred eighty".