2215826 has 4 divisors (see below), whose sum is σ = 3323742. Its totient is φ = 1107912.

The previous prime is 2215823. The next prime is 2215847. The reversal of 2215826 is 6285122.

2215826 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1825201 + 390625 = 1351^2 + 625^2 .

It is a d-powerful number, because it can be written as 2⁹ + 2¹⁷ + 1 + 5⁹ + 8 + 2¹⁷ + 6² .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2215795 and 2215804.

It is not an unprimeable number, because it can be changed into a prime (2215823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 553955 + ... + 553958.

2^2215826 is an apocalyptic number.

2215826 is a deficient number, since it is larger than the sum of its proper divisors (1107916).

2215826 is a wasteful number, since it uses less digits than its factorization.

2215826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107915.

The product of its digits is 1920, while the sum is 26.

The square root of 2215826 is about 1488.5650808749. The cubic root of 2215826 is about 130.3702659067.

The spelling of 2215826 in words is "two million, two hundred fifteen thousand, eight hundred twenty-six".