2265221 has 6 divisors (see below), whose sum is σ = 2635110. Its totient is φ = 1941576.

The previous prime is 2265173. The next prime is 2265223. The reversal of 2265221 is 1225622.

It can be written as a sum of positive squares in only one way, i.e., 2265025 + 196 = 1505^2 + 14^2 .

It is not a de Polignac number, because 2265221 - 2¹⁴ = 2248837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2265193 and 2265202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2265223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23066 + ... + 23163.

It is an arithmetic number, because the mean of its divisors is an integer number (439185).

2^2265221 is an apocalyptic number.

It is an amenable number.

2265221 is a deficient number, since it is larger than the sum of its proper divisors (369889).

2265221 is an equidigital number, since it uses as much as digits as its factorization.

2265221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46243 (or 46236 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 2265221 is about 1505.0651148704. The cubic root of 2265221 is about 131.3318896374.

The spelling of 2265221 in words is "two million, two hundred sixty-five thousand, two hundred twenty-one".