2158550 has 24 divisors (see below), whose sum is σ = 4191696. Its totient is φ = 825440.

The previous prime is 2158549. The next prime is 2158567. The reversal of 2158550 is 558512.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 212 + ... + 2088.

It is an arithmetic number, because the mean of its divisors is an integer number (174654).

2^2158550 is an apocalyptic number.

2158550 is a deficient number, since it is larger than the sum of its proper divisors (2033146).

2158550 is a wasteful number, since it uses less digits than its factorization.

2158550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912 (or 1907 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 2158550 is about 1469.2004628368. The cubic root of 2158550 is about 129.2371496465.

The spelling of 2158550 in words is "two million, one hundred fifty-eight thousand, five hundred fifty".