22163021 has 4 divisors (see below), whose sum is σ = 22172544. Its totient is φ = 22153500.

The previous prime is 22163003. The next prime is 22163023. The reversal of 22163021 is 12036122.

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 22163021 - 2¹⁴ = 22146637 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22163023) 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, 1316 + ... + 6786.

It is an arithmetic number, because the mean of its divisors is an integer number (5543136).

Almost surely, 2^22163021 is an apocalyptic number.

It is an amenable number.

22163021 is a deficient number, since it is larger than the sum of its proper divisors (9523).

22163021 is an equidigital number, since it uses as much as digits as its factorization.

22163021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9522.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 22163021 is about 4707.7617824185. The cubic root of 22163021 is about 280.8943385116.

Adding to 22163021 its reverse (12036122), we get a palindrome (34199143).

The spelling of 22163021 in words is "twenty-two million, one hundred sixty-three thousand, twenty-one".