4223581 has 4 divisors (see below), whose sum is σ = 4228000. Its totient is φ = 4219164.

The previous prime is 4223563. The next prime is 4223617. The reversal of 4223581 is 1853224.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4223581 - 2¹¹ = 4221533 is a prime.

It is a super-2 number, since 2×4223581² = 35677272927122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4223501) 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, 111 + ... + 2908.

It is an arithmetic number, because the mean of its divisors is an integer number (1057000).

Almost surely, 2^4223581 is an apocalyptic number.

It is an amenable number.

4223581 is a deficient number, since it is larger than the sum of its proper divisors (4419).

4223581 is a wasteful number, since it uses less digits than its factorization.

4223581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4418.

The product of its digits is 1920, while the sum is 25.

The square root of 4223581 is about 2055.1352753529. The cubic root of 4223581 is about 161.6442557000.

The spelling of 4223581 in words is "four million, two hundred twenty-three thousand, five hundred eighty-one".