2115305 has 4 divisors (see below), whose sum is σ = 2538372. Its totient is φ = 1692240.

The previous prime is 2115301. The next prime is 2115307. The reversal of 2115305 is 5035112.

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 851929 + 1263376 = 923^2 + 1124^2 .

It is not a de Polignac number, because 2115305 - 2² = 2115301 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115301) 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, 211526 + ... + 211535.

It is an arithmetic number, because the mean of its divisors is an integer number (634593).

2^2115305 is an apocalyptic number.

It is an amenable number.

2115305 is a deficient number, since it is larger than the sum of its proper divisors (423067).

2115305 is an equidigital number, since it uses as much as digits as its factorization.

2115305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423066.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 2115305 is about 1454.4088146048. The cubic root of 2115305 is about 128.3682632004.

The spelling of 2115305 in words is "two million, one hundred fifteen thousand, three hundred five".