2215956 has 24 divisors (see below), whose sum is σ = 5281920. Its totient is φ = 722752.

The previous prime is 2215949. The next prime is 2215963. The reversal of 2215956 is 6595122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2215949) and next prime (2215963).

It is a d-powerful number, because it can be written as 2⁴ + 2¹⁸ + 1 + 5⁴ + 9 + 5⁹ + 6² .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1401 + ... + 2528.

It is an arithmetic number, because the mean of its divisors is an integer number (220080).

2^2215956 is an apocalyptic number.

It is an amenable number.

2215956 is an abundant number, since it is smaller than the sum of its proper divisors (3065964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2215956 is a wasteful number, since it uses less digits than its factorization.

2215956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3983 (or 3981 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

The square root of 2215956 is about 1488.6087464475. The cubic root of 2215956 is about 130.3728154154.

The spelling of 2215956 in words is "two million, two hundred fifteen thousand, nine hundred fifty-six".