2221263 has 28 divisors (see below), whose sum is σ = 3646248. Its totient is φ = 1341360.

The previous prime is 2221259. The next prime is 2221273. The reversal of 2221263 is 3621222.

It is not a de Polignac number, because 2221263 - 2² = 2221259 is a prime.

2221263 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221253) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 7881 + ... + 8157.

2^2221263 is an apocalyptic number.

2221263 is a deficient number, since it is larger than the sum of its proper divisors (1424985).

2221263 is an equidigital number, since it uses as much as digits as its factorization.

2221263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306 (or 291 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 2221263 is about 1490.3902173592. The cubic root of 2221263 is about 130.4768091965.

Adding to 2221263 its reverse (3621222), we get a palindrome (5842485).

It can be divided in two parts, 222 and 1263, that added together give a triangular number (1485 = T₅₄).

The spelling of 2221263 in words is "two million, two hundred twenty-one thousand, two hundred sixty-three".