2815863 has 8 divisors (see below), whose sum is σ = 3975408. Its totient is φ = 1766784.

The previous prime is 2815861. The next prime is 2815877. The reversal of 2815863 is 3685182.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2815863 - 2¹ = 2815861 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2815861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27556 + ... + 27657.

It is an arithmetic number, because the mean of its divisors is an integer number (496926).

2^2815863 is an apocalyptic number.

2815863 is a deficient number, since it is larger than the sum of its proper divisors (1159545).

2815863 is a wasteful number, since it uses less digits than its factorization.

2815863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55233.

The product of its digits is 11520, while the sum is 33.

The square root of 2815863 is about 1678.0533364586. The cubic root of 2815863 is about 141.2116433299.

The spelling of 2815863 in words is "two million, eight hundred fifteen thousand, eight hundred sixty-three".