2155554 has 24 divisors (see below), whose sum is σ = 4822272. Its totient is φ = 695160.

The previous prime is 2155519. The next prime is 2155579. The reversal of 2155554 is 4555512.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1374 + ... + 2489.

It is an arithmetic number, because the mean of its divisors is an integer number (200928).

2^2155554 is an apocalyptic number.

2155554 is an abundant number, since it is smaller than the sum of its proper divisors (2666718).

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

2155554 is a wasteful number, since it uses less digits than its factorization.

2155554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3902 (or 3899 counting only the distinct ones).

The product of its digits is 5000, while the sum is 27.

The square root of 2155554 is about 1468.1805066135. The cubic root of 2155554 is about 129.1773295857.

It can be divided in two parts, 21555 and 54, that added together give a square (21609 = 147²).

The spelling of 2155554 in words is "two million, one hundred fifty-five thousand, five hundred fifty-four".