2288521 has 4 divisors (see below), whose sum is σ = 2312212. Its totient is φ = 2264832.

The previous prime is 2288509. The next prime is 2288527. The reversal of 2288521 is 1258822.

2288521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1258822 = 2 ⋅629411.

It can be written as a sum of positive squares in 2 ways, for example, as 546121 + 1742400 = 739^2 + 1320^2 .

It is a cyclic number.

It is not a de Polignac number, because 2288521 - 2⁹ = 2288009 is a prime.

It is a super-3 number, since 3×2288521³ = 35957207858353334283, which contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2288521.

It is not an unprimeable number, because it can be changed into a prime (2288527) 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 3 ways as a sum of consecutive naturals, for example, 11700 + ... + 11893.

It is an arithmetic number, because the mean of its divisors is an integer number (578053).

2^2288521 is an apocalyptic number.

It is an amenable number.

2288521 is a deficient number, since it is larger than the sum of its proper divisors (23691).

2288521 is an equidigital number, since it uses as much as digits as its factorization.

2288521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23690.

The product of its digits is 2560, while the sum is 28.

The square root of 2288521 is about 1512.7858407587. The cubic root of 2288521 is about 131.7806465535.

It can be divided in two parts, 2288 and 521, that added together give a square (2809 = 53²).

The spelling of 2288521 in words is "two million, two hundred eighty-eight thousand, five hundred twenty-one".