2155034305 has 4 divisors (see below), whose sum is σ = 2586041172. Its totient is φ = 1724027440.

The previous prime is 2155034269. The next prime is 2155034309. The reversal of 2155034305 is 5034305512.

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 517699009 + 1637335296 = 22753^2 + 40464^2 .

It is not a de Polignac number, because 2155034305 - 2²⁵ = 2121479873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155034309) by changing a digit.

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, 215503426 + ... + 215503435.

It is an arithmetic number, because the mean of its divisors is an integer number (646510293).

Almost surely, 2^2155034305 is an apocalyptic number.

It is an amenable number.

2155034305 is a deficient number, since it is larger than the sum of its proper divisors (431006867).

2155034305 is an equidigital number, since it uses as much as digits as its factorization.

2155034305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431006866.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 2155034305 is about 46422.3470432075. The cubic root of 2155034305 is about 1291.6694738105.

Adding to 2155034305 its reverse (5034305512), we get a palindrome (7189339817).

It can be divided in two parts, 21550 and 34305, that added together give a palindrome (55855).

The spelling of 2155034305 in words is "two billion, one hundred fifty-five million, thirty-four thousand, three hundred five".