2821155 has 16 divisors (see below), whose sum is σ = 4660224. Its totient is φ = 1455840.

The previous prime is 2821153. The next prime is 2821163. The reversal of 2821155 is 5511282.

It is not a de Polignac number, because 2821155 - 2¹ = 2821153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2821151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2569 + ... + 3498.

It is an arithmetic number, because the mean of its divisors is an integer number (291264).

2^2821155 is an apocalyptic number.

2821155 is a deficient number, since it is larger than the sum of its proper divisors (1839069).

2821155 is a wasteful number, since it uses less digits than its factorization.

2821155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6106.

The product of its digits is 800, while the sum is 24.

The square root of 2821155 is about 1679.6294234146. The cubic root of 2821155 is about 141.3000501360.

The spelling of 2821155 in words is "two million, eight hundred twenty-one thousand, one hundred fifty-five".