2181598 has 4 divisors (see below), whose sum is σ = 3272400. Its totient is φ = 1090798.

The previous prime is 2181581. The next prime is 2181601. The reversal of 2181598 is 8951812.

2181598 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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 as a sum of consecutive naturals, namely, 545398 + ... + 545401.

It is an arithmetic number, because the mean of its divisors is an integer number (818100).

2^2181598 is an apocalyptic number.

2181598 is a deficient number, since it is larger than the sum of its proper divisors (1090802).

2181598 is a wasteful number, since it uses less digits than its factorization.

2181598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090801.

The product of its digits is 5760, while the sum is 34.

The square root of 2181598 is about 1477.0233579737. The cubic root of 2181598 is about 129.6955003435.

The spelling of 2181598 in words is "two million, one hundred eighty-one thousand, five hundred ninety-eight".