2215998 has 20 divisors (see below), whose sum is σ = 4965840. Its totient is φ = 738612.

The previous prime is 2215991. The next prime is 2215999. The reversal of 2215998 is 8995122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215991) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6678 + ... + 7001.

It is an arithmetic number, because the mean of its divisors is an integer number (248292).

2^2215998 is an apocalyptic number.

2215998 is an abundant number, since it is smaller than the sum of its proper divisors (2749842).

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

2215998 is a wasteful number, since it uses less digits than its factorization.

2215998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13693 (or 13684 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 2215998 is about 1488.6228535126. The cubic root of 2215998 is about 130.3736390815.

It can be divided in two parts, 2 and 215998, that added together give a cube (216000 = 60³).

The spelling of 2215998 in words is "two million, two hundred fifteen thousand, nine hundred ninety-eight".