2815491 has 24 divisors (see below), whose sum is σ = 4432320. Its totient is φ = 1584912.

The previous prime is 2815469. The next prime is 2815493. The reversal of 2815491 is 1945182.

It is a happy number.

2815491 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 2815491 - 2⁶ = 2815427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2815493) by changing a digit.

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, 15640 + ... + 15818.

It is an arithmetic number, because the mean of its divisors is an integer number (184680).

2^2815491 is an apocalyptic number.

2815491 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2815491 is a deficient number, since it is larger than the sum of its proper divisors (1616829).

2815491 is a wasteful number, since it uses less digits than its factorization.

2815491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 296 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The square root of 2815491 is about 1677.9424900753. The cubic root of 2815491 is about 141.2054246271.

The spelling of 2815491 in words is "two million, eight hundred fifteen thousand, four hundred ninety-one".