2631855 has 16 divisors (see below), whose sum is σ = 4459104. Its totient is φ = 1320960.

The previous prime is 2631851. The next prime is 2631887. The reversal of 2631855 is 5581362.

It is not a de Polignac number, because 2631855 - 2² = 2631851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2631851) 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, 4906 + ... + 5415.

It is an arithmetic number, because the mean of its divisors is an integer number (278694).

2^2631855 is an apocalyptic number.

2631855 is a deficient number, since it is larger than the sum of its proper divisors (1827249).

2631855 is a wasteful number, since it uses less digits than its factorization.

2631855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10346.

The product of its digits is 7200, while the sum is 30.

The square root of 2631855 is about 1622.2992942118. The cubic root of 2631855 is about 138.0661833350.

It can be divided in two parts, 2631 and 855, that added together give a triangular number (3486 = T₈₃).

The spelling of 2631855 in words is "two million, six hundred thirty-one thousand, eight hundred fifty-five".