2215869 has 4 divisors (see below), whose sum is σ = 2954496. Its totient is φ = 1477244.

The previous prime is 2215867. The next prime is 2215901. The reversal of 2215869 is 9685122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2215869 - 2¹ = 2215867 is a prime.

It is a super-2 number, since 2×2215869² = 9820150850322, which contains 22 as substring.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹⁷ + 2¹⁷ + 1 + 5⁹ + 8³ + 6 + 9² .

It is a D-number.

2215869 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215867) 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, 369309 + ... + 369314.

It is an arithmetic number, because the mean of its divisors is an integer number (738624).

2^2215869 is an apocalyptic number.

It is an amenable number.

2215869 is a deficient number, since it is larger than the sum of its proper divisors (738627).

2215869 is an equidigital number, since it uses as much as digits as its factorization.

2215869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738626.

The product of its digits is 8640, while the sum is 33.

The square root of 2215869 is about 1488.5795242445. The cubic root of 2215869 is about 130.3711092168.

The spelling of 2215869 in words is "two million, two hundred fifteen thousand, eight hundred sixty-nine".