2215109 has 4 divisors (see below), whose sum is σ = 2385516. Its totient is φ = 2044704.

The previous prime is 2215099. The next prime is 2215111. The reversal of 2215109 is 9015122.

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 532900 + 1682209 = 730^2 + 1297^2 .

It is a cyclic number.

It is not a de Polignac number, because 2215109 - 2¹⁶ = 2149573 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215159) 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, 85184 + ... + 85209.

It is an arithmetic number, because the mean of its divisors is an integer number (596379).

2^2215109 is an apocalyptic number.

It is an amenable number.

2215109 is a deficient number, since it is larger than the sum of its proper divisors (170407).

2215109 is a wasteful number, since it uses less digits than its factorization.

2215109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170406.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 2215109 is about 1488.3242254294. The cubic root of 2215109 is about 130.3562025935.

The spelling of 2215109 in words is "two million, two hundred fifteen thousand, one hundred nine".