2231998 has 8 divisors (see below), whose sum is σ = 3544992. Its totient is φ = 1050336.

The previous prime is 2231941. The next prime is 2232017. The reversal of 2231998 is 8991322.

2231998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×2231998³ = 33358203831248351976, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 65647 = 2231998 / (2 + 2 + 3 + 1 + 9 + 9 + 8).

It is a d-powerful number, because it can be written as 2⁷ + 2¹⁷ + 3⁷ + 1 + 9³ + 9³ + 8⁷ .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32790 + ... + 32857.

It is an arithmetic number, because the mean of its divisors is an integer number (443124).

2^2231998 is an apocalyptic number.

2231998 is a deficient number, since it is larger than the sum of its proper divisors (1312994).

2231998 is a wasteful number, since it uses less digits than its factorization.

2231998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65666.

The product of its digits is 7776, while the sum is 34.

The square root of 2231998 is about 1493.9872824091. The cubic root of 2231998 is about 130.6866625075.

Subtracting from 2231998 its product of digits (7776), we obtain a palindrome (2224222).

The spelling of 2231998 in words is "two million, two hundred thirty-one thousand, nine hundred ninety-eight".