2051998 has 16 divisors (see below), whose sum is σ = 3341520. Its totient is φ = 945048.

The previous prime is 2051969. The next prime is 2051999. The reversal of 2051998 is 8991502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051999) 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, 4161 + ... + 4627.

It is an arithmetic number, because the mean of its divisors is an integer number (208845).

2^2051998 is an apocalyptic number.

2051998 is a deficient number, since it is larger than the sum of its proper divisors (1289522).

2051998 is an equidigital number, since it uses as much as digits as its factorization.

2051998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 2051998 is about 1432.4796682676. The cubic root of 2051998 is about 127.0746662428.

The spelling of 2051998 in words is "two million, fifty-one thousand, nine hundred ninety-eight".