2223781 has 8 divisors (see below), whose sum is σ = 2566080. Its totient is φ = 1887648.

The previous prime is 2223773. The next prime is 2223829. The reversal of 2223781 is 1873222.

2223781 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2223781 - 2³ = 2223773 is a prime.

It is a super-2 number, since 2×2223781² = 9890403871922, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁵ + 2¹³ + 2²¹ + 3⁵ + 7⁶ + 8³ + 1 .

It is a Duffinian number.

2223781 is strictly pandigital in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 736 + ... + 2233.

It is an arithmetic number, because the mean of its divisors is an integer number (320760).

2^2223781 is an apocalyptic number.

It is an amenable number.

2223781 is a deficient number, since it is larger than the sum of its proper divisors (342299).

2223781 is a wasteful number, since it uses less digits than its factorization.

2223781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3083.

The product of its digits is 1344, while the sum is 25.

The square root of 2223781 is about 1491.2347233082. The cubic root of 2223781 is about 130.5260929509.

The spelling of 2223781 in words is "two million, two hundred twenty-three thousand, seven hundred eighty-one".