2282581 has 4 divisors (see below), whose sum is σ = 2608672. Its totient is φ = 1956492.

The previous prime is 2282549. The next prime is 2282587. The reversal of 2282581 is 1852822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1852822 = 2 ⋅926411.

It is a cyclic number.

It is not a de Polignac number, because 2282581 - 2⁵ = 2282549 is a prime.

It is a super-2 number, since 2×2282581² = 10420352043122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2282587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163035 + ... + 163048.

It is an arithmetic number, because the mean of its divisors is an integer number (652168).

2^2282581 is an apocalyptic number.

It is an amenable number.

2282581 is a deficient number, since it is larger than the sum of its proper divisors (326091).

2282581 is an equidigital number, since it uses as much as digits as its factorization.

2282581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326090.

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

The square root of 2282581 is about 1510.8212998234. The cubic root of 2282581 is about 131.6665327849. Note that the first 3 decimals are identical.

It can be divided in two parts, 228 and 2581, that added together give a square (2809 = 53²).

The spelling of 2282581 in words is "two million, two hundred eighty-two thousand, five hundred eighty-one".