2815281 has 12 divisors (see below), whose sum is σ = 4647552. Its totient is φ = 1608696.

The previous prime is 2815271. The next prime is 2815289. The reversal of 2815281 is 1825182.

It is not a de Polignac number, because 2815281 - 2¹³ = 2807089 is a prime.

It is a super-2 number, since 2×2815281² = 15851614217922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2815289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22281 + ... + 22406.

It is an arithmetic number, because the mean of its divisors is an integer number (387296).

2^2815281 is an apocalyptic number.

2815281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2815281 is a deficient number, since it is larger than the sum of its proper divisors (1832271).

2815281 is a wasteful number, since it uses less digits than its factorization.

2815281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44700 (or 44697 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 2815281 is about 1677.8799122702. The cubic root of 2815281 is about 141.2019138273.

Subtracting from 2815281 its reverse (1825182), we obtain a palindrome (990099).

The spelling of 2815281 in words is "two million, eight hundred fifteen thousand, two hundred eighty-one".