8211998 has 4 divisors (see below), whose sum is σ = 12318000. Its totient is φ = 4105998.

The previous prime is 8211991. The next prime is 8212019. The reversal of 8211998 is 8991128.

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

It is a super-2 number, since 2×8211998² = 134873822304008, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8211991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2052998 + ... + 2053001.

It is an arithmetic number, because the mean of its divisors is an integer number (3079500).

Almost surely, 2^8211998 is an apocalyptic number.

8211998 is a deficient number, since it is larger than the sum of its proper divisors (4106002).

8211998 is a wasteful number, since it uses less digits than its factorization.

8211998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4106001.

The product of its digits is 10368, while the sum is 38.

The square root of 8211998 is about 2865.6583885732. The cubic root of 8211998 is about 201.7512704994.

The spelling of 8211998 in words is "eight million, two hundred eleven thousand, nine hundred ninety-eight".