2855831 has 4 divisors (see below), whose sum is σ = 3115464. Its totient is φ = 2596200.

The previous prime is 2855819. The next prime is 2855843. The reversal of 2855831 is 1385582.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (2855819) and next prime (2855843).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2855831 is a prime.

It is a super-2 number, since 2×2855831² = 16311541401122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2855851) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 129800 + ... + 129821.

It is an arithmetic number, because the mean of its divisors is an integer number (778866).

2^2855831 is an apocalyptic number.

2855831 is a deficient number, since it is larger than the sum of its proper divisors (259633).

2855831 is a wasteful number, since it uses less digits than its factorization.

2855831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259632.

The product of its digits is 9600, while the sum is 32.

The square root of 2855831 is about 1689.9204123272. The cubic root of 2855831 is about 141.8766203312.

It can be divided in two parts, 285 and 5831, that added together give a palindrome (6116).

The spelling of 2855831 in words is "two million, eight hundred fifty-five thousand, eight hundred thirty-one".