22150321 has 4 divisors (see below), whose sum is σ = 22160932. Its totient is φ = 22139712.

The previous prime is 22150319. The next prime is 22150327. The reversal of 22150321 is 12305122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19713600 + 2436721 = 4440^2 + 1561^2 .

It is a cyclic number.

It is not a de Polignac number, because 22150321 - 2¹ = 22150319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22150295 and 22150304.

It is not an unprimeable number, because it can be changed into a prime (22150327) 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, 1020 + ... + 6733.

It is an arithmetic number, because the mean of its divisors is an integer number (5540233).

Almost surely, 2^22150321 is an apocalyptic number.

It is an amenable number.

22150321 is a deficient number, since it is larger than the sum of its proper divisors (10611).

22150321 is an equidigital number, since it uses as much as digits as its factorization.

22150321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10610.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 22150321 is about 4706.4127528299. The cubic root of 22150321 is about 280.8406749532.

Adding to 22150321 its reverse (12305122), we get a palindrome (34455443).

The spelling of 22150321 in words is "twenty-two million, one hundred fifty thousand, three hundred twenty-one".