2158554 has 16 divisors (see below), whose sum is σ = 4338720. Its totient is φ = 715920.

The previous prime is 2158549. The next prime is 2158567. The reversal of 2158554 is 4558512.

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 7 ways as a sum of consecutive naturals, for example, 589 + ... + 2159.

It is an arithmetic number, because the mean of its divisors is an integer number (271170).

2^2158554 is an apocalyptic number.

2158554 is an abundant number, since it is smaller than the sum of its proper divisors (2180166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2158554 is a wasteful number, since it uses less digits than its factorization.

2158554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805.

The product of its digits is 8000, while the sum is 30.

The square root of 2158554 is about 1469.2018241208. The cubic root of 2158554 is about 129.2372294760.

The spelling of 2158554 in words is "two million, one hundred fifty-eight thousand, five hundred fifty-four".