2149170505 has 4 divisors (see below), whose sum is σ = 2579004612. Its totient is φ = 1719336400.

The previous prime is 2149170473. The next prime is 2149170533. The reversal of 2149170505 is 5050719412.

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 1204714681 + 944455824 = 34709^2 + 30732^2 .

It is not a de Polignac number, because 2149170505 - 2⁵ = 2149170473 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 214917046 + ... + 214917055.

It is an arithmetic number, because the mean of its divisors is an integer number (644751153).

Almost surely, 2^2149170505 is an apocalyptic number.

It is an amenable number.

2149170505 is a deficient number, since it is larger than the sum of its proper divisors (429834107).

2149170505 is an equidigital number, since it uses as much as digits as its factorization.

2149170505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429834106.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 2149170505 is about 46359.1469399513. The cubic root of 2149170505 is about 1290.4968750742.

Adding to 2149170505 its reverse (5050719412), we get a palindrome (7199889917).

It can be divided in two parts, 214 and 9170505, that added together give a palindrome (9170719).

The spelling of 2149170505 in words is "two billion, one hundred forty-nine million, one hundred seventy thousand, five hundred five".