2211998 has 4 divisors (see below), whose sum is σ = 3318000. Its totient is φ = 1105998.

The previous prime is 2211997. The next prime is 2212003. The reversal of 2211998 is 8991122.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552998 + ... + 553001.

It is an arithmetic number, because the mean of its divisors is an integer number (829500).

2^2211998 is an apocalyptic number.

2211998 is a deficient number, since it is larger than the sum of its proper divisors (1106002).

2211998 is a wasteful number, since it uses less digits than its factorization.

2211998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106001.

The product of its digits is 2592, while the sum is 32.

The square root of 2211998 is about 1487.2787230375. The cubic root of 2211998 is about 130.2951479387.

The spelling of 2211998 in words is "two million, two hundred eleven thousand, nine hundred ninety-eight".