2155343105 has 4 divisors (see below), whose sum is σ = 2586411732. Its totient is φ = 1724274480.

The previous prime is 2155343089. The next prime is 2155343111. The reversal of 2155343105 is 5013435512.

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 441714289 + 1713628816 = 21017^2 + 41396^2 .

It is not a de Polignac number, because 2155343105 - 2⁴ = 2155343089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215534306 + ... + 215534315.

It is an arithmetic number, because the mean of its divisors is an integer number (646602933).

Almost surely, 2^2155343105 is an apocalyptic number.

It is an amenable number.

2155343105 is a deficient number, since it is larger than the sum of its proper divisors (431068627).

2155343105 is an equidigital number, since it uses as much as digits as its factorization.

2155343105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431068626.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 2155343105 is about 46425.6729084243. The cubic root of 2155343105 is about 1291.7311663294.

Adding to 2155343105 its reverse (5013435512), we get a palindrome (7168778617).

It can be divided in two parts, 21553 and 43105, that multiplied together give a triangular number (929042065 = T₄₃₁₀₅).

The spelling of 2155343105 in words is "two billion, one hundred fifty-five million, three hundred forty-three thousand, one hundred five".