2215944 has 32 divisors (see below), whose sum is σ = 6156000. Its totient is φ = 738576.

The previous prime is 2215943. The next prime is 2215949. The reversal of 2215944 is 4495122.

2215944 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2215944² = 9820815622272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2215943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4914 + ... + 5345.

It is an arithmetic number, because the mean of its divisors is an integer number (192375).

2^2215944 is an apocalyptic number.

2215944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2215944 is an abundant number, since it is smaller than the sum of its proper divisors (3940056).

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

2215944 is a wasteful number, since it uses less digits than its factorization.

2215944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10274 (or 10264 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 2215944 is about 1488.6047158329. The cubic root of 2215944 is about 130.3725800803.

The spelling of 2215944 in words is "two million, two hundred fifteen thousand, nine hundred forty-four".