105521140225 has 12 divisors (see below), whose sum is σ = 131569126780. Its totient is φ = 83950516800.

The previous prime is 105521140213. The next prime is 105521140247. The reversal of 105521140225 is 522041125501.

It can be written as a sum of positive squares in 6 ways, for example, as 57649450609 + 47871689616 = 240103^2 + 218796^2 .

It is not a de Polignac number, because 105521140225 - 2⁷ = 105521140097 is a prime.

It is a super-2 number, since 2×105521140225² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 105521140193 and 105521140202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11655270 + ... + 11664319.

Almost surely, 2^105521140225 is an apocalyptic number.

It is an amenable number.

105521140225 is a deficient number, since it is larger than the sum of its proper divisors (26047986555).

105521140225 is a wasteful number, since it uses less digits than its factorization.

105521140225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23319780 (or 23319775 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 105521140225 its reverse (522041125501), we get a palindrome (627562265726).

The spelling of 105521140225 in words is "one hundred five billion, five hundred twenty-one million, one hundred forty thousand, two hundred twenty-five".