2109545285 has 4 divisors (see below), whose sum is σ = 2531454348. Its totient is φ = 1687636224.

The previous prime is 2109545279. The next prime is 2109545293. The reversal of 2109545285 is 5825459012.

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 1443544036 + 666001249 = 37994^2 + 25807^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2109545285 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210954524 + ... + 210954533.

It is an arithmetic number, because the mean of its divisors is an integer number (632863587).

Almost surely, 2^2109545285 is an apocalyptic number.

It is an amenable number.

2109545285 is a deficient number, since it is larger than the sum of its proper divisors (421909063).

2109545285 is an equidigital number, since it uses as much as digits as its factorization.

2109545285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421909062.

The product of its (nonzero) digits is 144000, while the sum is 41.

The square root of 2109545285 is about 45929.7864680427. The cubic root of 2109545285 is about 1282.5164696868.

The spelling of 2109545285 in words is "two billion, one hundred nine million, five hundred forty-five thousand, two hundred eighty-five".