2815155 has 48 divisors (see below), whose sum is σ = 5800704. Its totient is φ = 1283040.

The previous prime is 2815129. The next prime is 2815157. The reversal of 2815155 is 5515182.

It is not a de Polignac number, because 2815155 - 2⁵ = 2815123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2815157) 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 47 ways as a sum of consecutive naturals, for example, 8340 + ... + 8670.

It is an arithmetic number, because the mean of its divisors is an integer number (120848).

2^2815155 is an apocalyptic number.

2815155 is an abundant number, since it is smaller than the sum of its proper divisors (2985549).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2815155 is an equidigital number, since it uses as much as digits as its factorization.

2815155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 346 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 2815155 is about 1677.8423644669. The cubic root of 2815155 is about 141.1998072635.

Adding to 2815155 its sum of digits (27), we get a palindrome (2815182).

The spelling of 2815155 in words is "two million, eight hundred fifteen thousand, one hundred fifty-five".