2149555 has 4 divisors (see below), whose sum is σ = 2579472. Its totient is φ = 1719640.

The previous prime is 2149517. The next prime is 2149559. The reversal of 2149555 is 5559412.

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

It is not a de Polignac number, because 2149555 - 2¹⁷ = 2018483 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2149559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214951 + ... + 214960.

It is an arithmetic number, because the mean of its divisors is an integer number (644868).

2^2149555 is an apocalyptic number.

2149555 is a deficient number, since it is larger than the sum of its proper divisors (429917).

2149555 is an equidigital number, since it uses as much as digits as its factorization.

2149555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429916.

The product of its digits is 9000, while the sum is 31.

The square root of 2149555 is about 1466.1360782683. The cubic root of 2149555 is about 129.0573828796.

It can be divided in two parts, 2149 and 555, that added together give a square (2704 = 52²).

The spelling of 2149555 in words is "two million, one hundred forty-nine thousand, five hundred fifty-five".