2851555 has 24 divisors (see below), whose sum is σ = 4054752. Its totient is φ = 1919232.

The previous prime is 2851543. The next prime is 2851561. The reversal of 2851555 is 5551582.

2851555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2851555 - 2⁵ = 2851523 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25179 + ... + 25291.

It is an arithmetic number, because the mean of its divisors is an integer number (168948).

2^2851555 is an apocalyptic number.

2851555 is a deficient number, since it is larger than the sum of its proper divisors (1203197).

2851555 is a wasteful number, since it uses less digits than its factorization.

2851555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 228 counting only the distinct ones).

The product of its digits is 10000, while the sum is 31.

The square root of 2851555 is about 1688.6547900622. The cubic root of 2851555 is about 141.8057749317.

The spelling of 2851555 in words is "two million, eight hundred fifty-one thousand, five hundred fifty-five".