2227581 has 24 divisors (see below), whose sum is σ = 3407040. Its totient is φ = 1454112.

The previous prime is 2227543. The next prime is 2227583. The reversal of 2227581 is 1857222.

It is not a de Polignac number, because 2227581 - 2¹⁰ = 2226557 is a prime.

It is a super-2 number, since 2×2227581² = 9924234223122, which contains 22 as substring.

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

It is a d-powerful number, because it can be written as 2⁴ + 2¹³ + 2¹⁸ + 7 + 5⁹ + 8⁴ + 1 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2227583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21576 + ... + 21678.

It is an arithmetic number, because the mean of its divisors is an integer number (141960).

2^2227581 is an apocalyptic number.

It is an amenable number.

2227581 is a deficient number, since it is larger than the sum of its proper divisors (1179459).

2227581 is an equidigital number, since it uses as much as digits as its factorization.

2227581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 195 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 2227581 is about 1492.5082914343. The cubic root of 2227581 is about 130.6003983644.

The spelling of 2227581 in words is "two million, two hundred twenty-seven thousand, five hundred eighty-one".