2152105105 has 4 divisors (see below), whose sum is σ = 2582526132. Its totient is φ = 1721684080.

The previous prime is 2152105103. The next prime is 2152105127. The reversal of 2152105105 is 5015012512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 340070481 + 1812034624 = 18441^2 + 42568^2 .

It is not a de Polignac number, because 2152105105 - 2¹ = 2152105103 is a prime.

It is a super-2 number, since 2×2152105105² = 9263112765934122050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2152105103) 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, 215210506 + ... + 215210515.

It is an arithmetic number, because the mean of its divisors is an integer number (645631533).

Almost surely, 2^2152105105 is an apocalyptic number.

It is an amenable number.

2152105105 is a deficient number, since it is larger than the sum of its proper divisors (430421027).

2152105105 is an equidigital number, since it uses as much as digits as its factorization.

2152105105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430421026.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 2152105105 is about 46390.7868547193. The cubic root of 2152105105 is about 1291.0839806146.

Adding to 2152105105 its reverse (5015012512), we get a palindrome (7167117617).

The spelling of 2152105105 in words is "two billion, one hundred fifty-two million, one hundred five thousand, one hundred five".