22023181 has 4 divisors (see below), whose sum is σ = 22535392. Its totient is φ = 21510972.

The previous prime is 22023179. The next prime is 22023193. The reversal of 22023181 is 18132022.

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 an emirpimes, since its reverse is a distinct semiprime: 18132022 = 2 ⋅9066011.

It is a cyclic number.

It is not a de Polignac number, because 22023181 - 2¹ = 22023179 is a prime.

It is a super-2 number, since 2×22023181² = 970041002717522, 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 (22023481) 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, 256041 + ... + 256126.

It is an arithmetic number, because the mean of its divisors is an integer number (5633848).

Almost surely, 2^22023181 is an apocalyptic number.

It is an amenable number.

22023181 is a deficient number, since it is larger than the sum of its proper divisors (512211).

22023181 is an equidigital number, since it uses as much as digits as its factorization.

22023181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512210.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 22023181 is about 4692.8862121300. The cubic root of 22023181 is about 280.3023137829.

The spelling of 22023181 in words is "twenty-two million, twenty-three thousand, one hundred eighty-one".