2263621 has 4 divisors (see below), whose sum is σ = 2268000. Its totient is φ = 2259244.

The previous prime is 2263619. The next prime is 2263627. The reversal of 2263621 is 1263622.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 2263621 - 2¹ = 2263619 is a prime.

It is a Duffinian number.

2263621 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2263592 and 2263601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2263627) 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, 1291 + ... + 2488.

It is an arithmetic number, because the mean of its divisors is an integer number (567000).

2^2263621 is an apocalyptic number.

It is an amenable number.

2263621 is a deficient number, since it is larger than the sum of its proper divisors (4379).

2263621 is an equidigital number, since it uses as much as digits as its factorization.

2263621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4378.

The product of its digits is 864, while the sum is 22.

The square root of 2263621 is about 1504.5334825121. The cubic root of 2263621 is about 131.3009610118.

Subtracting from 2263621 its reverse (1263622), we obtain a palindrome (999999).

The spelling of 2263621 in words is "two million, two hundred sixty-three thousand, six hundred twenty-one".